Motorola M68HC08 manual Low-Voltage Evaluation Motor Hardware Set Components, EVM Motor Board

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Hardware Design

4.4.3 3-phase BLDC High Voltage Motor with Motor Brake

The High Voltage BLDC motor-brake set incorporates a 3-phase High Voltage BLDC motor and attached BLDC motor brake. The BLDCmotor has six poles. The incremental position encoder is coupled to the motor shaft, and position Hall sensors are mounted between motor and brake. They allow sensing of the position if required by the control algorithm.

Detailed motor-brake specifications are listed in Table 2-2, Section 2.

4.5 Low-Voltage Evaluation Motor Hardware Set Components

4.5.1 EVM Motor Board

Motorola’s embedded motion control series EVM motor board is a

12-volt, 4-amp, surface-mount power stage that is shipped with an MCG IB23810-H1 brushless dc motor. In combination with one of the embedded motion control series control boards, it provides a software development platform that allows algorithms to be written and tested without the need to design and build a power stage. It supports algorithms that use Hall sensors, encoder feedback, and back EMF (electromotive force) signals for sensorless control.

The EVM motor board does not have overcurrent protection that is independent of the control board, so some care in its setup and use is required if a lower impedance motor is used. With the motor that is supplied in the kit, the power output stage will withstand a full-stall condition without the need for overcurrent protection. Current measuring circuitry is set up for 4 amps full scale. In a 25οC ambient operation at up to 6 amps continuous RMS output current is within the board’s thermal limits.

Input connections are made via 40-pin ribbon cable connector J1. Power connections to the motor are made on output connector J2. Phase A, phase B, and phase C are labeled on the board. Power requirements are met with a single external 12-Vdc, 4-amp power supply. Two connectors, labeled J3 and J4, are provided for the 12-volt power supply. J3 and J4 are located on the front edge of the board. Power is supplied to one or the other, but not both.

Designer Reference Manual		DRM028 — Rev 0
70	Hardware Design	MOTOROLA
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