DesignDRIVE IDDK Hardware Reference Guide

Introduction

The DesignDRIVE kit (IDDK) is a single platform that facilitates development and evaluation of design solutions for many industrial drive and servo topologies. The IDDK offers support for a wide variety of motor types, sensing technologies, encoder standards, and communications networks. The IDDK also offers easy expansion to develop with real-time Ethernet communications and functional safety topologies that enable more comprehensive, integrated system solutions. Based on the real-time control architecture of TI’s C2000™ microcontrollers (MCUs), the kit is ideal for the development of industrial inverter and servo drives used in robotics, computer numerical control (CNC) machinery, elevators, materials conveyance, and other industrial manufacturing applications.

Trademarks

C2000, Delfino are registered trademarks of TI.

All other trademarks are the property of their respective owners.

Overview

The IDDK offers an integrated-drive design with a full-power stage to drive a 3-phase motor, easing evaluation of a diverse range of feedback sensing and control topologies. The kit includes a 180-pin HSEC controlCARD based on the TMS320F28379D C2000 Delfino™ MCU, which integrates dual C28x real-time processing cores and dual CLA real-time coprocessors that provide 800 MIPS of floating-point performance with integrated trigonometric and FFT acceleration.

The sophisticated sensing peripherals on the TMS320F28379D MCU include sigma-delta filter modules with up to eight input channels, four high-performance 16-bit ADCs, and eight windowed comparators. These peripherals enable the IDDK to support shunt, flux gate/HALL, and sigma-delta current sensing simultaneously. For position feedback, the IDDK leverages integrated MCU support for the resolver and incremental encoder interfaces. In addition, customers can also explore configuration options that place the MCU on either side of the high-voltage isolation barrier.

TI designed the kit to plug into 110-V/220-V AC mains, deliver up to 8 amps, and to drive motors to 1 horsepower.

This document covers the kit contents and hardware details and explains the functions and locations of various connector on the board. This document supersedes all the documents for the kit.

WARNING

TI intends this EVM to be operated in a lab environment only and does not consider it to be a finished product for general consumer use.

TI intends this EVM to be used only by qualified engineers and technicians familiar with risks associated with handling high-voltage electrical and mechanical components, systems, and subsystems.

This equipment operates at voltages and currents that can cause shock, fire, and/or injure you if not properly handled or applied. Use the equipment with necessary caution and appropriate safeguards to avoid injuring yourself or damaging property.

TI considers it the user’s responsibility to confirm that the voltages and isolation requirements are identified and understood before energizing the board and or simulation. When energized, do not touch the EVM or components connected to the EVM.

1 Getting Familiar With the Kit

1.1 Contents of the Kit

The kit consists of the following items:

An IDDK EVM
A TMDSCNCD28379D control processor
A USB-A to USB Mini-B
A PMSM motor for evaluation
- The motor is not included with TMDXIDDK379D.
- The motor is included with TMDXIDDKM379D bundle.
- The motor is available stand-alone from the TI eStore. (The part number is HVPMSMMTR.)
Items not included
- An external, isolated power supply for developing code at low voltage

1.2 IDDK EVM Features

The EVM has the following features:

Processor slots for control, real-time connectivity, and functional safety
The Position Encoder Suite
The Current Sensor Suite
A high-voltage rectifier and inverter
Power supplies
Two digital-to-analog converters (DACs) to observe system variables on an oscilloscope for debugging
The Hardware Developer’s Package (including schematics and bill of materials) is available through MotorControl SDK.

2 Hardware Overview

2.1 IDDK Evaluation Board

Figure 2-1 shows that the IDDK evaluation board is an open board without enclosures.

Figure 2-1 IDDK EVM Kit

The board can be divided into the following functional blocks:

The processor (CPU) block for control, real-time connectivity, and functional safety
The position encoder suite
The current sensor suite
The power inverter and rectifier
Onboard power supplies

For experimentation, three GND planes are on the board: one plane is for safety and connectivity circuits, another plane is for control and interface, and a third plane is for high power circuits. Provisions are on the board to connect GND planes. If the control GND is tied to the power GND, ensure that position sensors and encoders connected to the board are properly grounded to earth.

NOTE

IDDK offers reconfigurable GND planes, an interprocessor interface, and power stage control. The GND plane configurations can change depending on the style of current sensing and position sensing in the drive solution. The default configuration of the GND planes is only intended for users to develop MCU software drivers to evaluate their topologies. TI does not recommend this configuration for any final drive design or solution. You can select and develop control strategies based on the GND plane reconfigurations and interprocessor interface.

The default isolation/GND configuration of revision R2.2.1 of this evaluation board is set up to have all controlCARDs (H1, H7, and H8) and their interface circuits be separate from the high voltage inverter GND. controlCARDS H1, H7, and H8 have COLD GND, while the inverter has HOT GND.

In the previous release of the board, IDDK R2.2, the control GND was tied to HOT GND in R2.2. In R2.2.1, control GND is tied to COLD GND. Take care while switching between these two boards considering the changes in control GND configuration..

2.2 Functional Blocks

Figure 2-2 shows the functional block diagram of the IDDK. Dedicated processors provide the system with control, real-time connectivity, and safety functions. The control processor has a suite of position encoder interfaces and current sense interfaces. You can configure the controller to select the interfaces you want. Table 2-1 shows that each block is subdivided into macros representing a subfunction.

Figure 2-2 Functional Block Diagram of IDDK

Table 2-1 Hardware Macros in IDDK and Their Functions

Functional Block	Macro Reference	Macro Function
Power Supplies	M2	Isolated DC-DC converter – 400 V to 15 V
	M3	DC-Power Supply – Linear Reg 15 V – 5 V to 3.3 V
	M8	Isolated DC/DC Converter – 400 V to 15 V
	M9	DC-Power Supply – Linear Reg 15 V – 5 V to 3.3 V
Rectifier and Inverter	M1	AC Main Power Entry
Rectifier and Inverter	M4	3-Phase Inverter
Current Sensor Suite	M5	Flux Gate – Motor Current Sense Interface
	M6	Overcurrent Protection
	M7	Sigma-Delta – Motor Current Sense Interface
Position Encoder Suite	M10	QEP Interface
	M11	Resolver Interface
	M12	EnDat Encoder Interface
	M13	Sin-Cos Encoder Interface
Processors	Main board	All other functions

The following sections present each functional block and their macros. Figure 2-3 shows the layout of various macros in the board. Schematic details of the individual macros are available at \ti\c2000\C2000Ware_MotorControl_SDK_version\solutions\tmdxiddk379d\hardware\IDDK_HwDevPkg_r2.2.1.

Figure 2-3 Layout of IDDK EVM With Functional Macros

2.3 Processor Section

Figure 2-4 Processor Block