Corey Pollock

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This paper presents a new class of brushless motor as an alternative to the permanent-magnet brushed motor used in the automotive industry. The new flux-switching motor is a very simple motor to manufacture, and, coupled with a powerelectronic controller requiring only two power semiconductor switches, it has the potential to be extremely low cost in high(More)
In this paper, a permanent magnet flux switching motor (PMFSM) is presented as an alternative to the more familiar brushless DC motor (BDC) used in low energy consumption axial fans. The PMFSM has permanent magnets as a part of the stator structure which also contains an armature winding. The rotor is a simple steel, salient pole structure. Simulated and(More)
This paper presents a novel multi-pole permanent magnet synchronous machine for the traction applications in which both high torque capability at low speed and wide speed operating range are required. The origin of the proposed machine construction is from a hybrid stepper machine, but the uniqueness lies in the utilization of soft magnetic composites (SMC)(More)
This paper describes the results of a comparison between the acoustic noise produced by a two-phase switched reluctance drive and a flux switching motor and drive. For the comparison, two external rotor machines were constructed from identical mechanical parts, and the same lamination stacks. Test results show that there is over 2 dB less acoustic noise(More)
This paper proposes a control technique for an ac/dc converter and high-speed single-phase brushless ac generator topology with a reactive armature winding. An ac-to-dc pulsewidth-modulation (PWM) converter is used with phase angle control to deliver a controlled power factor for a wide speed range while maintaining a low kVA rating of the converter and the(More)
This paper presents the design and control of high speed brushless generator topology suitable for independent power generation system. Phase angle pulse width modulation PWM control is used in delivering controlled power factor from the generator for a very wide speed and output power range while maintaining a low kVA rating of the converter. The generator(More)
Switched reluctance drives have been shown to benefit from DC flux assistance from a coil arrangement that is mutually coupled to all its phase windings. This paper proposes an alternative and way of providing this additional DC flux through the use of a toroidal, axially oriented coil. A reluctance machine is constructed and tested in which the stator(More)
Accurate and fast detection of the radial displacement of rotor position is one of the key factors for successful bearingless control. In this paper, a new design of displacement sensor is proposed, which has a simple structure and inherent low-cost. The basic principle of the proposed sensor is that the airgap difference between two opposite sides can be(More)
Switched reluctance motor drives have been shown to benefit from DC flux assistance from a coil arrangement that is mutually coupled to all its phase windings. This paper proposes an alternative way of providing this additional DC flux through a toroidal, axially oriented coil. The motor comprises a two phase 4/2 switched reluctance stator adjacent to an(More)
This paper describes a Simulink model of a flux switching generator system FSG with controlled armature power factor, suitable for high speed applications. The generator is a flux-switching machine derived from an inductor alternator and the switched reluctance machine. Using an 8/4 configuration of this machine the electrical characteristics of this(More)