Nuvoton Nu-LVMDM-MOS User manual

Nu-LVMDM-MOS V2.2 User Manual
Sept. 24, 2013 1 of 32 Rev. 1.01
Nuvoton
Nu-LVMDM-MOS V2.2
User Manual
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro
™
microcontroller based system
design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.

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Table of Contents
1 OVERVIEW .......................................................................................................................... - 3 -
1.1 F EATURES ................................................................................................................................. - 4 -
2 INTRODUCTION TO NU-LVMDM-MOS .............................................................................. - 5 -
2.1 N U -LVMDM-MOS J UMPER ..................................................................................................... - 6 -
2.2 P IN A SSIGNMENT FOR E XTENDED C ONNECTORS .................................................................... - 8 -
2.2.1 Plug-In Module (PIM) Configuration .............................................................................. - 8 -
2.2.2 Input Power Connectors (J4, P4-P5) .......................................................................... - 10 -
2.2.3 UART Interface (CN1) ................................................................................................... - 10 -
2.2.4 Nu-Link Connector (CON1) .......................................................................................... - 11 -
2.2.5 Dedicated Oriental Motor Connector (CN4) ............................................................... - 11 -
2.2.6 Hall Sensor Connector (CN3) ...................................................................................... - 11 -
2.2.7 QEI Connector (CN2) .................................................................................................... - 12 -
2.2.8 Push-Buttons, LEDs, DIP/Toggle-Switch and VR ..................................................... - 13 -
2.3 N U -LVMDM-MOS PCB P LACEMENT ................................................................................... - 15 -
3 RUNNING A BLDC MOTOR USING A SENSORLESS ALGORITHM ............................. - 16 -
3.1 O PERATING R EQUIREMENTS .................................................................................................. - 16 -
3.2 N U -LVMDM-MOS D EVELOPMENT B OARD S ETUP ............................................................... - 17 -
3.2.1 Setting the Nu-LVMDM-MOS Development Board ................................................... - 17 -
4 NU-LVMDM-MOS SCHEMATICS AND LAYOUT PLACEMENT ...................................... - 19 -
5 REVISION HISTORY ......................................................................................................... - 32 -

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1 Overview
The Nuvoton Low Voltage Motor Development Module using MOSFET power
stage (Nu-LVMDM-MOS) is used to accelerate product development by providing
ready-to-run hardware and a comprehensive Motor Development Adapter
(Nu-MDA-xxx).
The power supply can be connected to the power connector terminal (J4) or the
Auxiliary Power Tab Fast-On Connector terminals (P4-P5).
The components on the board that receive power are described as follows:
Gate drivers receive +15V power from a +15V regulator
OP Amplifiers receive +8V power from a +8V regulator
MCU motor control device receives +5V power from a +5V regulator
LCD Display receives +3.3V power from a +3.3V regulator

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1.1 Features
The key features of this board include the following:
Motor Control Interfaces
- Three-phase inverter bridge with a power rating of 36V/20A
- Hall sensors interface for sensored motor control (CN3)
- Quadrature encoder interface for sensored motor control (CN2)
- Phase voltage feedback for sensorless BLDC operation
- DC bus voltage sense for over-voltage control
- Phase current sense resistor for one / three shunt vector control
- Over-current protection
- Support for MT530 series MCUs with internal or external op amps and
comparators
Input/Output Control Switches
- Two push-buttons (K1 and K2)
- Two LED indicators for debugging purposes (LED1 and LED2)
- Reset push-button (K3)
- 50 KΩVR (VR2)
- LED indicator for Power on status (LED3)
- LCD display for debugging purposes (LCD1)
- DIP switch for configuration purposes (SW2)
- Toggle switch for motor start (SW1)
Communication Ports
- UART communication (CN1)
Power Supply Connectors
- Auxiliary Power Tab Fast-On connectors (P4 and P5) for the controller and
power stage
- Dedicated power connector (J4) for the controller and power stage
Programming Connectors
- Nu-Link connector for programming a Nuvoton MCU (CON1)

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2 Introduction to Nu-LVMDM-MOS
The Nu-LVMDM-MOS is targeted to control a brushless DC (BLDC) motor or
permanent magnet synchronous motor (PMSM) in sensor or sensorless operation.
This flexible and cost-effective module can be configured in different ways for use
with Nuvoton’s specialized motor control Microcontrollers (MCUs).
The Nu-LVMDM-MOS supports the Mini51, M051, and MT530 motor control
device families. It offers a mounting option to connect a generic 80-pin Plug-In
Module (PIM). The Nu-LVMDM-MOS also has a three-phase inverter bridge
circuit. The circuit drives a BLDC or PMSM motor using different control
techniques without requiring any additional hardware.
The board includes various circuitries to perform the following functions:
Drive a three-phase inverter that powers the motor phase windings
Measure feedback signals (e.g. voltage and phase currents) and provide a
suitable fault signal
Interface with Hall sensor or quadrature encoder for sensor-based
commutation
Communicate with a host computer or an external device via USB interface
Support motors with terminal voltage up to 36V and current up to 20A.
Note: If the output power exceeds 100W, the power MOSFETs (Q1-Q6) may
need a larger heat sink.

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2.1 Nu-LVMDM-MOS Jumper
The Nu-LVMDM-MOS Development Board has five jumpers that configure the
functionality of the board. The following figure shows the jumper locations and the
following tables list the jumpers and their functions.
Figure 2-1 Jumper Setting
No. Designator Function
1 JP1 Comparator- for Over Current
2 JP2 Comparator+ for Over Current
3 JP3 U Phase current feedback
4 JP4 V Phase current feedback
5 JP5 Sum (U+V+W) current feedback
Table 2-1 Jumper Functions

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No. Designator Position Description
1 JP1 1 - 2 I_Sum signal into MCU’s internal comparator-
2 - 3 I_Sum signal into external comparator-
2 JP2 1 - 2 V_BIAS into MCU’s internal comparator+
2 - 3 V_BIAS into external comparator+
3 JP3 1 - 2 U Phase current feedback into MCU’s internal OPA
2 - 3 U Phase current feedback into external OPA
4 JP4 1 - 2 V Phase current feedback into MCU’s internal OPA
2 - 3 V Phase current feedback into external OPA
5 JP5 1 - 2 I_Sum from RL1 current sensing resistor
2 - 3 I_Sum from 3 shunt current sensing resistor
Table 2-2 Jumper Description
Note:
I_Sum: Sum current after amplified (refer to the Nu-LVMDM-MOS Schematics
and Layout PLACEMENT section).
VR1: V_BIAS adjustment for over-current threshold.
is used as the symbol for pin 1.

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2.2 Pin Assignment for Extended Connectors
2.2.1 Plug-In Module (PIM) Configuration
The following table summarizes the PIM (Nu-MDA-xxx) pin-out for the
Nu-LVMDM-MOS Development Board.
PIM Pin # Signal Name Pin-out Description
1 GND Ground
2 Speed Speed signal
3 DIP4 DIP4
4 GND Ground
5 DIP3 DIP3
6 SCL N/A
7 DIP2 DIP2
8 SDA N/A
9 DIP1 DIP1
10 N/A N/A
11 KEY4 N/A
12 DAC_CS DAC Chip Select
13 KEY3 N/A
14 DAC_SDO DAC Serial Data
15 GND Ground
16 DAC_SCK DAC_Serial Clock
17 KEY2 KEY2
18 TXD UART Transmit
19 KEY1 KEY1
20 RXD UART Receive
21 RUN Motor start or stop
22 N/A N/A
23 GND Ground
24 GND Ground
25 5V 5V input for MCU
26 5V 5V input for MCU

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27 N/A N/A
28 DISP_SDO LCD Display_Serial Data Out
29 LED1 LED1
30 DISP_SCK LCD Display_Serial Clock
31 LED2 LED2
32 DISP_RS LCD Display_Select Register
33 N/A N/A
34 DISP_RST LCD Display_Reset
35 ICE_DAT ICE_Data
36 N/A N/A
37 ICE_CLK ICE_Clock
38 N/A N/A
39 ICE_RST ICE_Reset
40 N/A N/A
41 I_W Amplified W phase current
42 GND Ground
43 I_Sum Amplified sum current
44 Volt_U Voltage feedback signal for U phase
45 /BR N/A
46 Volt_V Voltage feedback signal for V phase
47 DCV DC bus voltage (downscaled)
48 Volt_W Voltage feedback signal for W phase
49 V_BIAS Sum current threshold
50 GND Ground
51 I_Sum_NA Non-Amplified sum current
52 Hall_U Hall sensor signal for U phase
53 /OC Over Current signal
54 Hall_V Hall sensor signal for V phase
55 I_U Amplified U phase current
56 Hall_W Hall sensor signal for W phase
57 I_V Amplified V phase current
58 QEI-Z QEI input
59 Iv- N/A

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60 QEI-B QEI input
61 Iv+ V phase current feedback into MCU internal OP2+
62 QEI-A QEI input
63 Iu- N/A
64 BR_DRV N/A
65 Iu+ U phase current feedback into MCU internal OP1+
66 AC_Phase N/A
67 UL PWM Output UL
68 AC_SumI N/A
69 VL PWM Output VL
70 PFC_DCV N/A
71 WL PWM Output WL
72 PFC_CTL N/A
73 N/A IPM_Fault Output
74 Relay_SW N/A
75 UH PWM Output UH
76 GND Ground
77 VH PWM Output VH
78 PFC_FO N/A
79 WH PWM Output WH
80 FBI_P N/A
Table 2-3 Nu-LVMDM-MOS Development Board PIM Pin-out Functionality
2.2.2 Input Power Connectors (J4, P4-P5)
The Nu-LVMDM-MOS Development Board receives the power for controlling
circuits and the DC bus from a +24V power supply (connected to the board
through J4 or P4-P5).
2.2.3 UART Interface (CN1)
The board uses an external PL-2303 interface as a bridge between the UART and
USB.

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2.2.4 Nu-Link Connector (CON1)
The Nu-Link connector is a 10-pin male connector (CON1) that connects the
Nu-Link In-Circuit Debugger/Emulator to the NuMicro™ MCU for programming
and debugging purposes.
2.2.5 Dedicated Oriental Motor Connector (CN4)
The dedicated motor connector (CN4) has 8 terminals. The following table shows
the functionality of each terminal.
Pin # Terminal Name Function
1 H_V Hall V feedback
2 H_W Hall W feedback
3 H_U Hall U feedback
4 GND Hall sensors ground
5 +5V Hall sensors power supply
6 U Motor winding phase U
7 V Motor winding phase V
8 W Motor winding phase W
Table 2-4 Oriental Motor Connector Details
2.2.6 Hall Sensor Connector (CN3)
The hall sensor connector (CN3) has 5 terminals. The following shows the
functionality of each terminal.
Pin # Terminal Name Function
1 +5V Hall sensors power supply
2 GND Hall sensors ground
3 H_U Hall U feedback
4 H_V Hall V feedback
5 H_W Hall W feedback
Table 2-5 Hall Sensor Connector Details

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2.2.7 QEI Connector (CN2)
The Quadrature Encoder Interface connector (CN2) has 5 terminals. The
following table shows the functionality of each terminal.
Pin # Terminal Name Function
1 +5V QEI sensors power supply
2 GND QEI sensors ground
3 QEI_A QEI_A feedback
4 QEI_B QEI_B feedback
5 QEI_Z QEI_Z feedback
Table 2-6 QEI Connector Details
The following table lists the test points that can be used to check various signals.
Test Points Description
GND Ground
+15V +15V for gate driver
+8V +8V for OP Amplifier
+5V +5V for MCU and peripherals
+3.3V +3.3V for LCD display
Table 2-7 Test Points

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2.2.8 Push-Buttons, LEDs, DIP/Toggle-Switch and VR
The Nu-LVMDM-MOS Development Board consists of the following items:
Two push-buttons
One VR for speed control
Two LEDs for debugging purposes
One power-on status LED
One DIP-switch
One Toggle-switch
Target MCU Reset push-button
Figure 2-2 shows the HUMAN INTERFACES and Table 2-8 lists the Human
Interfaces and their functions.
Label Hardware Element Description
K1, K2
Push-buttons which are connected to port pins.
When momentarily pressed, the switch connects the respective
port pin to Ground.
VR2 50K VR which is connected to analog input pin. Turn the SPEED
VR (VR2) to adjust the motor speed.
LED3 Power-on status LED, which indicates the status of the 3.3V
regulator.
LED1, LED2 LEDs to be used for debugging purposes.
K3 Push-button used to reset the target MCU.
SW1 Toggle-switch used to motor start/stop. Push up the toggle switch
(SW1) to start the motor in the Clockwise direction.
SW2
DIP-
switch used to configure the motor functions, push up the DIP
switch (SW2.1) to reverse the motor to Counter Clockwise
direction.
Table 2-8 Indicators and Human Interfaces

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Figure 2-2 Human Interfaces

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2.3 Nu-LVMDM-MOS PCB Placement
The following figure shows the connectors and jumpers available on the
Nu-LVMDM-MOS Development Board.
Figure 2-3 Nu-LVMDM-MOS Development Board Connectors and Jumpers
DC ower
Input
ower
LED
LCD
Display
Nu-Link
Interface
DAC
Module
Quadrature
Encoder
Interface
Reset
button
Oriental
Motor
Interface
Hall
Sensor
Interface
Configuration
Jumpers
Motor
Terminals
UART
Interface
Control
Interface
Status LEDs
Nuvoton
MDA
Interface

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3 Running a BLDC Motor Using a Sensorless Algorithm
This chapter describes how to set the Nu-LVMDM-MOS Development Board in
the external Op Amp configuration to run a BLDC motor using the Three-Shunt
Current Reconstruction Algorithm with a Nu-LVMDM-MOS Development Board.
3.1 Operating Requirements
To set and run the board, the following items are recommended:
Keil MDK-ARM (Evaluation Version) Integrated Development Environment
(IDE) installed on the PC (website: https://www.keil.com/demo/eval/arm.htm)
Nu-LVMDM-MOS Development Board
24V power supply or equivalent
BLDC motor

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3.2 Nu-LVMDM-MOS Development Board Setup
The following procedure describes how to set the Nu-LVMDM-MOS Development
Board. Figure 3-1 shows the connection on the Nu-LVMDM-MOS Development
Board.
WARNING:
The Nu-LVMDM-MOS Development Board is intended to drive the three-phase
BLDC motor. Before connecting the motor, make sure that the power rating of the
motor is equal to or less than the power rating of the board. Also, make sure the
jumper settings are correct for the firmware programmed into the target MCU
mounted on the socket. Failure to comply with this warning could lead to
malfunction of the board and the motor, and could result in physical harm.
Before beginning the start-up procedure, complete a visual check of the board
and the motor for connectivity and mechanical damage. If damage is found, DO
NOT power-up the board. Otherwise, you may further damage the equipment.
Contact the Nuvoton local office or distributor before using a damaged board.
3.2.1 Setting the Nu-LVMDM-MOS Development Board
Perform the following steps to set the development board:
1. Place the Nu-LVMDM-MOS Development Board on a sturdy insulated
platform.
2. Plug the Nuvoton Motor Development Adapter (Nu-MDA-xxx) into the
socket.(See Fig. A)
3. Connect Nu-Link ICE In-Circuit Emulator to the computer, and the board to
CON1.
4. Connect the three-phase, 10 pole, 24V (oriental motor) to CN4 (See Fig. B).
Since this is a sensorless algorithm, the motor phase wires (Red, Black, and
White) can be connected to P1, P2, and P3 in any order.
5. Connect the 24V power supply to J4 or P4-P5 (See Fig. C).
6. Make sure the power LED (LED3) illuminates (See Fig. D).
7. Push up SW1 to run the motor.
8. Vary the motor speed with VR2.
9. Pull down SW1 to stop the motor.

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Figure 3-1 Nu-LVMDM-MOS Development Board Connection
Fig. C
Fig. D
Fig. B
Fig. A

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4 Nu-LVMDM-MOS Schematics and Layout Placement
The following schematics are included in this user manual:
Figure 4-1 Power of Nu-LVMDM-MOS Development Board Schematic
Figure 4-2 Interface of Nu-LVMDM-MOS Development Board Schematic
Figure 4-3 Driver of Nu-LVMDM-MOS Development Board Schematic
Figure 4-4 MCU Interface of Nu-LVMDM-MOS Development Board Schematic
Figure 4-5 Nu-LVMDM-MOS Development Board Top Layout
Figure 4-6 Nu-LVMDM-MOS Development Board Bottom Layout
+3.3V
R121
30K
R111
2K
R114
10K
C58
1?
DCV
P
R120
330
+
C67
220? 16V
C63
0.1?
+8V_OP +5V
DCV
C64
0.1?
TP13 TP14TP12
FUSE
F1
10A/250V D11
SS14
1
3
2
J4
DCJACK
P4 P
P5 N
Vin
3VO 2
G1
VO
U14
AMS1117-3.3
C7
0.1?
R92
15/2W
P
+
C16
470? 63V
+
C14
100uF/25V
VIN
3VO 2
ADJ
U7
LM317
R90
120/1%
R80
1K/1%
R91
330/1%
R89
200/2W
R86
200/2W
R88
200/2W
R81
200/2W
+
C15
470? 63V
+15V
C61
0.22?
C62
0.1?
+15V
C11
0.1?
+
C12
220? 16V
+
C20
68?25V
O1
G2
I
3
G4
U8
78L08
O1
G2
I
3
G4
U9
78L05
GNDGNDGND
+15V
TP10
C10
1? 25V
+
C17
100?50V
+
C18
100? 50V
+
C19
10? 25V
P
LED3
Green

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Figure 4-7 Nu-MDA-M051 Adapter Board Schematic
Figure 4-8 Nu-MDA-M051 Adapter Board Layout
Figure 4-9 Nu-MDA-Mini51 Adapter Board Schematic
Figure 4-10 Nu-MDA-MINI51 Adapter Board Layout
Figure 4-11 Nu-MDA-MT530 Adapter Board Schematic
Figure 4-12 Nu-MDA-MT530 Adapter Board Layout
Figure 4-13 Nu-MDA-MT520R-64 Adapter Board Schematic
Figure 4-14 Nu-MDA-MT520R-64 Adapter Board Layout
Figure 4-15 Nu-MDA-MT520L-48 Adapter Board Schematic
Figure 4-16 Nu-MDA-MT520L-48 Adapter Board Layout