There is provided an onboard motor controller (1) that makes it possible to shorten the time until a failsafe process is executed at the time of a collision of a vehicle. A control circuit (15) in the motor controller (1) acquires an acceleration (G) detected by an acceleration sensor (8). When the acceleration (G) is equal to or higher than a prescribed value, the control circuit (15) determines that a collision of the vehicle has occurred, and executes a switching process of a control mode of a motor. The control circuit (15) immediately switches the control mode of a motor from voltage phase control by rectangular wave driving to current vector control based on sinusoidal PWM control when the collision is detected. The control circuit (15) reads current values from current detectors (14a, 14b, 14c). When an overcurrent is detected, the control circuit (15) executes a failsafe process to turn off the MOSFETs (Q1, Q2, Q3, Q4, Q5, Q6) of an inverter (13). The control circuit (15) stops a supply of electricity to the inverter (13) by turning off a power supply relay (11), thereby stopping the rotation of the electric motor (10).
Onboard motor controller
Bordseitige Motorsteuerung
Contrôleur de moteur embarqué
2019-08-21
Patent
Elektronische Ressource
Englisch
IPC: | 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 / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |