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.

Nu-LVMDM-MOS V2.2 User Manual
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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.