Encoder Interface (Con13); External Function Interface (Con9) - Wolfspeed SpeedVal MOD-MB-3P-0900V-40A Series User Manual

Pin
1
2
3
4
5
6

2.4 Encoder Interface (CON13)

A differential incremental encoder interface is provided for optional closed-loop motor control. For single-
ended encoders, the negative input lines on the motherboard can be connected to signal common (ground),
and the signal lines connected to the positive inputs.

2.5 External Function Interface (CON9)

The external function connector includes additional signal and power rails that can be used for additional
system functionality. These signals may not be utilized in the supplied firmware but are available. All signals
are referenced to control ground and should not be tied to other potentials or high-voltage circuitry without
proper isolation.
PWM_DB
The PWM_DB signal is a 0-5 V digital output signal intended to supply the gate signal for an external dynamic
brake (DB) transistor that can be used in conjunction with a high-power resistor across the DC bus to reduce
the bus voltage during motor braking or regeneration to prevent an overvoltage.
PRECHARGE_RLY
PRECHARGE_RLY is a 0-5 V digital output signal intended to control an external relay bypassing the
precharge resistor for active-front-end (AFE) topologies where the DC bus is charged from the AC mains.
TEMP_EXT
TEMP_EXT is a 0-5 V digital input that can be used for temperature feedback from an external system or
component. It can be implemented as an over-temperature signal (high/low), or as a frequency or duty cycle
PRD-08611 REV. 1, June 2024
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the Wolfspeed logo are trademarks of Wolfspeed, Inc. Other trademarks, product and company names are the property of their
respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association.
Table 5: Resolver connector pinout
Name/Description
EXC_P – Excitation signal positive line
EXC-N – Excitation signal negative line
SIN_P – Sine feedback positive line
SIN_N – Sine feedback negative line
COS_P – Cosine feedback positive line
COS_N – Cosine feedback negative line
Table 6: Encoder connector pinout
Pin Name/Description
1 +5V – supplied from motherboard Power
2 Ground
3 ENC_A_IN+
4 ENC_A_IN-
5 ENC_B_IN+
6 ENC_B_IN-
7 ENC_Z_IN+
8 ENC_Z_IN-
MOD-MB-3P-0900V-40A SpeedVal™ Kit Three-Phase Motherboard User Guide
Function
Output
Output
Input
Input
Input
Input
Function
GND
Input
Input
Input
Input
Input
Input
18