Delta Tau 3U AMP-4 User Manual

^1 USER MANUAL

^2 AMP-4

^3 4-Channel H-Bridge 65V Amplifier Board

^4 3Ax-603486-xUxx

^5 June 11, 2004

Single Source Machine Control Power // Flexibility // Ease of Use

21314 Lassen Street Chatsworth, CA 91311 // Tel. (818) 998-2095 Fax. (818) 998-7807 // www.deltatau.com

unauthorized without written permission of Delta Tau Data Systems, Inc. Information contained in this manual may be updated from time-to-time due to product improvements, etc., and may not conform in every respect to former issues.

To report errors or inconsistencies, call or email:

Delta Tau Data Systems, Inc. Technical Support

Phone: (818) 717-5656 Fax: (818) 998-7807 Email: support@deltatau.com Website: http://www.deltatau.com

Operating Conditions

All Delta Tau Data Systems, Inc. motion controller products, accessories, and amplifiers contain static sensitive components that can be damaged by incorrect handling. When installing or handling Delta Tau Data Systems, Inc. products, avoid contact with highly insulated materials. Only qualified personnel should be allowed to handle this equipment.

In the case of industrial applications, we expect our products to be protected from hazardous or conductive materials and/or environments that could cause harm to the controller by damaging components or causing electrical shorts. When our products are used in an industrial environment, install them into an industrial electrical cabinet or industrial PC to protect them from excessive or corrosive moisture, abnormal ambient temperatures, and conductive materials. If Delta Tau Data Systems, Inc. products are exposed to hazardous or conductive materials and/or environments, we cannot guarantee their operation.

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Table of Contents

INTRODUCTION.......................................................................................................................................................1

Power Supply Considerations........................................................................................................................................1

Current Mode Considerations........................................................................................................................................1

Amplifier-Enable/Fault Polarity Selection ....................................................................................................................1

Torque/Velocity Control................................................................................................................................................2

HARDWARE DESCRIPTION..................................................................................................................................3

TB1: 8-Pin PMAC Interface Terminal Block................................................................................................................3

TB2: 13-Pin Motor Amplifier Output Terminal Block..................................................................................................3

TB3: External Power Ground........................................................................................................................................3

TB4: External Power.....................................................................................................................................................3

TB5: Logic Power Terminal Block ...............................................................................................................................4

P1: 96-Pin Power Input Connector................................................................................................................................4

AMPLIFIER SPECIFICATIONS..............................................................................................................................5

Power Stage Specifications............................................................................................................................................5

Mechanical Specifications.............................................................................................................................................5

Environmental Specifications........................................................................................................................................5

AMPLIFIER USER COMPONENTS DESCRIPTION...........................................................................................7

Fuses..............................................................................................................................................................................7

LEDs..............................................................................................................................................................................7

Offset Pots.....................................................................................................................................................................7

AMPLIFIER DIAGRAM ...........................................................................................................................................9

SAMPLE WIRING DIAGRAM...............................................................................................................................11

ANALOG AMPLIFIER BACKPLANE BOARD...................................................................................................13

Single Quad H-Bridge Amplifier Backplane Layout...................................................................................................13

Dual Quad H-Bridge Amplifier Backplane Layout .....................................................................................................13

Analog Amplifier Backplane Connectors....................................................................................................................14

TB1 Bus Power and Shunt Resistor Inputs..............................................................................................................14

TB2 Logic Power Supply and Fan Power Supply Input..........................................................................................14

J1 Fan Power Supply Output..................................................................................................................................14

J2 Fan Power Supply Output..................................................................................................................................14

SCHEMATICS

Table of Contents i

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ii Table of Contents

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INTRODUCTION

The Quad H-Bridge High Power Drive is a 3U-size amplifier designed to drive DC brushed type motors. This amplifier provides four 520W continuous PWM amplifiers. The Quad H-Bridge High Power Drive may be interfaced conveniently to the PMAC controller via ACC-24E2A. The maximum bus voltage for this amplifier is 65VDC and the continuous rating for each drive is 8A.

The amplifiers on this product will output current proportional to the voltage input. The product was designed to be used with torque or current command inputs from the controller, but if the controller has microstepping capabilities, the product can be used to drive stepper motors.

Power Supply Considerations

The Quad H-Bridge High Power Drive requires a single power supply of +15V to +65Vmax. The current requirement can vary depending on the load, but should not exceed 32A continuous and 48A peak for a one-second period: i.e. 12A peak per channel. A slow blow 5A fuse is installed for the shunt and a fast acting 30A fuse for the main bus.

The bus power supply can be provided to the amplifier unit through Amplifier Backplane board or through the TB3 and TB4 terminal connectors located on the amplifier unit.

The amplifier receives its logic power supply (±15V) from an external power supply or the 3U power supply used for a UMAC system via the Amplifier Backplane board (part number 603490 or 603470, see last section of this manual).

If the amplifier is driven beyond its rated power, driver overheating may occur. In this event, the driver will output a fault signal on the corresponding pin of the terminal block 2, TB2, and turn on the corresponding red LED next to Terminal Block 1, TB1, shown in Diagram.

Note:

The bus voltage should be completely separate from PMAC analog ground.

Current Mode Considerations

The Quad H-Bridge High Power Drive is a current amplifier with a fixed current gain 1.25A/V. This means that the ± 10V signal input from each DAC on the J1 connector corresponds to ±12A of current across the load, provided that the bus supply voltage is not exceeded.

Note:

If the amplifier is driving a DC motor at high speeds, the current supply to the motor may be reduced if the back emf voltage of the motor is sufficiently large (refer to the motor manufacture's data sheet).

Amplifier-Enable/Fault Polarity Selection

The controller (PMAC) should be configured for low-true amplifier-enable signals. A green LED next to Terminal Block 1 (TB1) for each amplifier on the Quad H-Bridge is lit when the board is receiving power and that amplifier is enabled.

Also, if the amplifier fault signal is fed back to PMAC, bit 23 (the most significant bit) of Ix25 should be set to zero for "Low True" fault input. The red LED for each channel is lit when the amplifier faults (overheats).

Introduction 1

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Torque/Velocity Control

For direct torque or velocity control, the following I-variables may be adjusted as part of the motor software setup (Example for PMAC1-Turbo):

Ixx00 Set to 1 to activate motor. Ixx02 Motor xx Command Output Address. For example: I102=$078003 to use DAC1 with motor 1. Ixx03 Motor xx Position Loop Feedback Address. For example: I103=$3501 to use Encoder 1. Ixx04 Motor xx Velocity Loop Feedback Address. For example: I104=$3501 to use Encoder 1. Ixx24 Set motor xx Flag Mode Control. For example: I124=$100001 to specify high-true fault input. Ixx25 Set motor xx Flag Address. For example: I125=$078000 to specify channel 1 flags. Ixx69 Set motor xx Output Command Limit.

Refer to the Turbo PMAC/PMAC2 Software Reference Manual for a full description of these I-variables.

2 Introduction

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