Motor Control Unit
MCU-500
The MCU-500 is a combined inverter and DC/DC converter for use in hybrid and electric vehicles. Permanent magnet synchronous motors of surface or interior types are supported.
A high DC bus voltage coupled with liquid cooling allows for high motor power in a very compact and lightweight unit. The unit is self contained, and designed to be sited adjacent to a high voltage battery assembly. Output terminals provide the high current electrical connection to the motor.
Full motor control is provided; with a target torque demand being received through a CAN interface. Delivered torque is derived from motor currents and can be transmitted to the vehicle through the CAN interface.
This unit is designed and manufactured in-house. Bespoke variants can be provided according to customer requirements.
Key Features
- Low volume and mass to power ratio
- High power capability
- Motor type: Permanent Magnet Synchronous
- SPM – supported
- IPM – supported
- Torque demand supplied through vehicle CAN link
- Delivered torque derived from motor currents and transmitted through vehicle CAN link
- Field weakening supported
- Separate supervisor processor included for safety
- Capacitive discharge circuit included
Inverter
- Maximum current 475A rms
- Maximum DC bus voltage 630V
- DC bus input capacitance 232uF
- Switching frequency 16kHz (switches to 8kHz at low motor speeds)
DC/DC Converter
- Maximum current 250A
- Output voltage 12-16V (selectable via CAN)
Electrical
- Supply voltage 8-16V
Mechanical
- Volume 16litre
- Mass 17.5kg
- Dimensions 430mm x 201mm x 214mm
External Sensor Inputs
- Three Pt1000 (-50°C to 250°C)
- One Resolver
Internal Diagnostics
- One DC link voltage
- One DC link current
- Three Phase current
- Six Inverter temperatures
- One Cold plate temperature
Communications
- Three CAN interfaces
- Vehicle interface (500kbps)
- XCP interface (1Mbps)
- Motor control monitoring interface (1Mbps)
- Vehicle CAN message protocol defined according to customer requirements
Cooling
- Max inlet temperature 55°C
- Min flow-rate 20l/min (to achieve rated specification)
- Pressure drop 0.5bar
- Coolant type 50/50 water/glycol
- Max pressure 5bar
Environmental
- Rated to IP44
- Complies with the essential protection requirements of 89/336/EEC
