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A new hybrid excitation permanent machine-doubly fed hybrid excitation permanent magnet synchronous machine without rotor winding is presented. The structure, mathematic model and operation principle of the machine are introduced. It is shown that excitation regulation can be realized by changing the current of stator control winding. The field control performance in the generator and motor operation...
This paper designs a novel control method for energy efficient and wide speed range drive of the PMSM. The proposed method includes several parts: (1) using a PI speed controller to create a signed current norm value as input of the command converter. (2)The command converter can simply and accurately generate an analytical current command according to the current control standard satisfying the maximizing/current...
This paper deals with the seamless integration of high-frequency test voltages for IPMSM rotor-position estimation in the discrete-time current-controller with fixed sampling frequency of a voltage-source converter. Pulsed test voltages are used that don't interfere with the current samples taken to control the phase currents. For this purpose, an asymmetric pulse-width modulator is applied. As a...
This paper discusses the sensorless current control of a slowly rotating permanent-magnet synchronous machine (PMSM) in the condition of a fault during which the excitation of one phase is prevented. Assuming a zero leakage inductance, it is shown that auxiliary three-phase variables can be defined for which during faulty operation, the fault-free three-phase machine model is valid. Hence, by using...
An integral battery charger is proposed for an electric scooter with Li-Ion batteries and Interior-permanent-magnet (IPM) traction motor. The battery charger is integrated in the power hardware of the scooter, with the IPM traction drive that operates as three-phase dc-dc converter with power factor correction (PFC) capability. The control of the PFC battery charger is also integrated into the traction...
This paper describes realization of a fast current control system of permanent magnet synchronous motor (PMSM) based on model predictive control (MPC). This current controller directly selects one of the switching modes of a PWM inverter, while conventional one generates voltage reference regarding an inverter as ideal amplifier. The problem with selecting the switching mode to output is formulated...
This paper presents a voltage controlled scheme for brushless DC (BLDC) motor drives. The scheme combines both the low speed PWM control and the high speed phase advance commutation to obtain an extended speed range drive feature. In addition, the proposed scheme does not have a current control loop. Hence, no current sensor is needed in the drive. To satisfy the required over load protection demand,...
The single current regulator algorithm has been proven robust for flux weakening control of surface-mount PM (SPM) machines with active control of d-axis current and a fixed value of q-axis voltage applied. This paper proposes a new method to optimize the q-axis voltage adaptive to variable speeds and torque based on the single current regulator algorithm for the deep flux weakening control of a 50...
In this paper it is proposed an enhanced simplified control system with good dynamical performances for surface-mounted permanent magnet synchronous motors with sinusoidal current control (BLAC), in that to determine the rotor position respectively the speed are used two Hall sensors. The concept of the proposed control system is a speed closed loop. The motor speed is controlled by the voltage amplitude...
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