There is provided an onboard motor controller that starts a failsafe process in short time at a vehicle collision. A control circuit in the motor controller acquires an acceleration detected by an acceleration sensor. When the acceleration is equal to or higher than a prescribed value, the control circuit determines that a collision of the vehicle has occurred, and executes a switching process of a control mode of a motor. The control circuit immediately switches the control mode of a motor from voltage phase control to current vector control when the collision is detected. The control circuit reads current values from current detectors. When an overcurrent is detected, the control circuit executes a failsafe process to turn off the MOSFETs of an inverter. The control circuit stops a supply of electricity to the inverter by turning off a power supply relay, thereby stopping the rotation of the motor.
Onboard motor controller
2017-06-13
Patent
Electronic Resource
English
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
ONBOARD POWER SUPPLY CONTROLLER AND ONBOARD POWER SUPPLY
European Patent Office | 2020
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