Quantum mechanics

Control (management)

Phase (matter)

Voltage

Engineering

Space vector

Induction motor

Three-phase

Modulation (music)

Current sensor

Synchronous motor

Hall effect sensor

Vector control

Pulse-width modulation

Computer science

Acoustics

Current (fluid)

Physics

Inverter

Electronic engineering

Artificial intelligence

Phase modulation

Topology (electrical circuits)

Space vector modulation

Control theory (sociology)

Magnet

Electrical engineering

IEEE Transactions on Power Electronics

Current sensing techniques with reduced number of sensors attract a high interest from industry, for the possibility of cost reduction and sampling mismatch reduction. This article puts forward a new single current sensor (SCS) method for a permanent magnet synchronous motor three-phase current reconstruction, with a novel hybrid pulsewidth modulation (PWM) technique introduced. This method is implemented by changing the position of SCS from dc bus to a current branch, and a modified space vector PWM technique is employed to realize the phase current reconstruction. Compared with traditional SCS control methods, the proposed method can relieve the measurement dead-zones at sector boundary region without introducing extra compensation algorithms. Besides, this method can be realized not only with a single hall-effect current sensor but also a single shunt resistor, which further expands the applications and increases the system reliability as well. This method is also available in other motor control with a two-level three-phase PWM voltage source inverter topology. The accuracy and feasibility of the proposed method is validated by the simulation and experimental results.

New Three-Phase Current Reconstruction for PMSM Drive With Hybrid Space Vector Pulsewidth Modulation Technique