Acoustic Noise Removal of Sensorless Control for an IPMSM Based on Extended EMF and Voltage Injection Synchronized with PWM Carrier
- Resource Type
- Conference
- Authors
- Ishii, Yuki; Kubota, Hisao
- Source
- IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. :367-372 Oct, 2018
- Subject
- Computing and Processing
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Transportation
Delays
Switches
Inverters
Logic gates
Pulse width modulation
Estimation
IPMSM
Position sensorless control system
Deadtime
High frequency superimposed
Voltage injection
- Language
- ISSN
- 2577-1647
This paper presents a new sensorless control method that does not generate acoustic noises for interior permanent magnet synchronous motors (IPMSMs). The magnetic pole position estimation is based on an extended EMF, and a voltage inj ection synchronized with a PWM carrier. The carrier frequency is set high at 20 kHz, such that it is not audible by humans. A noise removal strategy is proposed. A dead-time compensation considering asymmetry and sampling time correction are used. A dead-time compensation voltage is added to the voltage command value based on the polarity of the phase current, and whether the PWM carrier is at the top or bottom. This compensates the effects of the dead-time without deteriorating the symmetry of the output pulse voltages. The current sampling timing is delayed to sample the current value at the proper timing because a Si inverter exhibits a switching delay. The effectiveness of the high-frequency carrier operations are verified by experimental results.