H2W technologies LPAM-1 User manual

Linear Power
Amplifier
Module
User's Guide
Version 2.0

Table of Contents
Table of Contents
Technical Specifications.........................................................................................7
Absolute Maximum Ratings.....................................................................7
Amplifier Specifications...........................................................................7
Amplifier Board Layout.........................................................................................9
Pinouts....................................................................................................................11
User Connection Header........................................................................11
Amplifier Mode Select............................................................................13
Voltage / Current Selection Header..........................................13
Power Supply Monitor Enable..............................................................14
Integrator Reset Enable.........................................................................15
Amplifier Configuration Block..............................................................15
Voltage Mode Gain Setting .......................................................16
Current Mode Configuration ...................................................18
Power Supply...........................................................................................23
Load Connection.....................................................................................25
GND Lug..................................................................................................26
Offset Adjustment...................................................................................26
Offset Adjustment Procedure....................................................27
Current Limit Adjustment.....................................................................27
Current Limit Adjustment Procedure......................................29
Status Indicator LEDs............................................................................29
External Fault Indication.......................................................................30
Amplifier Enable Inputs.........................................................................30
Command Signal.....................................................................................31
Current Monitoring................................................................................32
Installation.............................................................................................................33
Mechanical Mounting.............................................................................33
Cooling Fans............................................................................................34
Determining the Dissipated Power............................................35
Determining the Required Airflow for Cooling...................................36
Electrical Connections............................................................................37
Selecting a Power Supply.......................................................................38
Operating Voltage.......................................................................38
Current Handling Capability....................................................39
Power Supply Type.....................................................................39
Connecting A Single Unit.......................................................................39
i

Table of Contents
Connecting Multiple Units.....................................................................41
Appendix A............................................................................................................45
Dimensions...............................................................................................45
ii

List of Figures
Table of Figures
Figure 1. Layout of the amplifier board and the various features................................9
Figure 2. amplifier mode selection jumper....................................................................13
Figure 3. Power supply monitor jumper location.........................................................14
Figure 4. Integrator reset jumper detail........................................................................15
Figure 5. Amplifier configuration block details............................................................16
Figure 6. Schematic representation of the amplifier....................................................17
Figure 7. Simulink diagram showing the user adjustable values................................23
Figure 8. Power connection details.................................................................................24
Figure 9. Load connection details...................................................................................25
Figure 10. GND connection.............................................................................................26
Figure 11. Offset adjustment..........................................................................................27
Figure 12. Current limit setting......................................................................................29
Figure 13. Amplifier status indicator LEDs..................................................................30
Figure 14. Mounting hole locations A (green) or B (blue)............................................33
Figure 15. Mounting locations for the small (twin) fans..............................................34
Figure 16. Mounting location of the large fan...............................................................35
Figure 17. Single amplifier connections.........................................................................41
Figure 18. Multiple amplifiers connected with a single power supply........................42
Figure 19. Multiple power supplies to drive multiple power amplifiers.....................43
iii

List of Tables
List of Tables
Table 1. User Connection Header signal names and pinout........................................12
Table 2. Details of the various configuration options...................................................17
Table 3. Recommend values for the forward gain in current mode...........................18
Table 4. Factory configuration of the integration components...................................18
Table 5. Power supply connection..................................................................................24
Table 6. Amplifier output terminals..............................................................................25
Table 7. Ground lug connection.....................................................................................26
Table 8. Typical current limit settings...........................................................................28
Table 9. Current limit output pinouts............................................................................29
Table 10. Amplifier enable truth table...........................................................................31
Table 11. Command signal pinouts................................................................................31
Table 12. Current output pins........................................................................................32
iv

Linear Power
Amplifier Module
LPAM-1
Key Features
•Linear - Designed for low noise
operation
•High Output Current:
7A Continuous output
9A Peak output
•Wide Power Supply Range:
27 Volts to 60 Volts
•Wide Bandwidth:
>10kHz in current mode
>10kHz in voltage mode
•Dual Mode Operation:
Voltage Mode
Current Mode
•Fully Protected:
Thermal Shutdown
Adjustable Current Limit
Power Supply Monitor
•Active High and Active Low
amplifier enable inputs
•Offset Trim Adjustment
•Fault Indicator Output
•Startup / Shutdown Circuitry
disables the amplifier until power
supplies stabilize
Applications
•Voice Coil Actuators
•X-Y Stages
•Robotics
•Magnetic Bearings
Description
The Quanser Power Amplifier is a linear power amplifier designed to drive loads in either voltage
mode or current mode.
In the current mode configuration, the amplifier is best suited for inductive loads such as dc-motors and
voice coil actuators. The unit displays low noise, wide bandwidth and an offset voltage adjustable to
zero.
Designed to run from a single supply, the amplifier's features include; accurate current sensing,
selectable fixed gain configurations, current limiting, and thermal protection.

Technical Specifications
Technical Specifications
Absolute Maximum Ratings
Parameter Value Units
Supply Voltage 60 V
Output Current
Continuous
Peak
7
9
A
A
Input (command) Voltage
supply voltage = 27 V
supply voltage = 48 V
+/- 10
+/- 20
V
V
Operating Temperature
(ambient temperature, natural convection cooling)
Power de-rating occurs beyond this temperature.
50 °C
Amplifier Specifications
Parameter min max typical Units
Power Supply Range 27 60 30 V
Input Voltage (Differential, max)
Supply voltage = 27 V
Supply voltage = 48 V
20
40
V
V
Input Impedance 1 MOhm
Output Impedance <0.2 Ohms
Bandwidth
Voltage Mode
Current Mode
>10
>10
kHz
kHz
Power Amplifier Module User's Guide 7

Amplifier Specifications
Parameter min max typical Units
Disable input signal
high TTL level, 5V
low TTL level, 0V
1
1
mA
mA
Amplifier Fault output
TTL compatible, with 200 ohm resistor inline
(current limited to 25 mA)
05 V
Current Sense output (buffered) 1 mA
Current Limit Output
reference voltage 0.5 V / A 0.5
V/A
Offset Adjust Adjusts output to zero for
zero command (input)
signal.
8Power Amplifier Module User's Guide

Amplifier Board Layout
Amplifier Board Layout
This section of the manual describes the general layout of the board, and the location of key
features. Refer to this diagram when making connections and when locating functions on
the board.
Power Amplifier Module User's Guide 9
Figure 1. Layout of the amplifier board and the various features.
Ground Lug
Power
Load Connection
Voltage / Current
Select
Integrator Reset
Enable
Power Supply Monitor
Enable
Current Limit
Adjust
Offset
Adjust
Amplifier Configuration
Block
Fault / Status
Indicator LEDs
User Connection
Header