WaveSculptor Motor Interface Type 1: Halls and Thermistor
This document describes the function, interface and properties of the WaveSculptor motor interface circuit, type 1.
Position Sensor
Type
The type 1 interface reads three channels of position information from hall-effect position sensors. It provides each channel with a 1k pull-up resistor for use with open-collector sensors.
Power
Power is provided to the sensors, and this voltage is also used as the pull-up voltage for the three input resistors. By default, the voltage provided is 12V DC, but this can also be chosen as a factory option to be 5V DC.
Inputs
Each input is sensed by a schmitt-trigger logic input with hysteresis. Rising and falling input thresholds are at 2/3 and 1/3 of the power supply voltage.
Connector
The connector used for the motor sense signals is a 6-way 3mm pitch Molex MicroFit connector. The pinout is shown below, as viewed from the wire side – as you would look at it while inserting crimps.
Temperature Sensor
Type
The type 1 interface reads a single channel from an NTC thermistor. Linearisation is provided in hardware on the motor interface circuit, with further scaling, offset and B curve correction being provided by the WaveSculptor, with inputs from the calibration software and the user.
Input
By default, the linearisation is provided for a 100k @ 25°C sensor, but this can also be chosen as a factory option for different values, such as the relatively common 10k @ 25°C parts.
Connector
The connector used for motor temperature sense signals is a 2-way 3mm pitch Molex MicroFit connector. The pinout is shown below, as viewed from the wire side – as you would look at it while inserting crimps
Motor Controller Interface
Description
The interface to the WaveSculptor motor controller is provided using differential signal pairs transmitted by the motor interface, with three being received by timer channels in the WaveSculptor, and one being received by a serial UART peripheral. Regulated 5V and 12V power is provided by the WaveSculptor for use by the motor interface circuitry and sensors.
Connector
The connector used for motor sense signals is a 14-way 3mm pitch Molex MicroFit connector. The pinout is shown below, as viewed from the wire side – as you would look at it while inserting crimps.
The wiring for this connector should be implemented with twisted pairs, as the signal inputs are differential. Prohelion recommends using Belden 9506 type cable (shielded 6 pair) for this connection, with suggested cable colours shown above.