Rotor Speed Detection Method for an Ultra High Speed Induction Motor Utilizing Slot Harmonics Denso Corporation

Format:

Conference/Event

Author/Creator:

Masuzawa, Takashi, author.

Conference Name:

SAE World Congress & Exhibition (2007-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

Recently many automotive components have become electrified and an ultra high speed drive (over 150,000 rpm) is now expected in applications such as a turbocharger. In these applications, a robust induction motor (IM) with a rectangular wave drive is generally adopted. A speed sensor is required to control the IM, but it can cause problems concerning cost, space and reliability. Thus, a sensorless speed detection method is required. Because general sensorless methods based on a sinusoidal wave drive are not applicable to a rectangular wave drive, we propose a method utilizing slot harmonics that are generated by the mechanical structure of the IM. Signal-to-noise (S/N) ratio of slot harmonics is very small, and hence we suggest three techniques: a detection circuit, a digital filter with a variable passband, and a detection method to restart the motor while rotating.The proposed method was evaluated with a test vehicle, and the results show that the rotor speed of IM can be detected up to 180,000 rpm with error less than 0.5%

Notes:

Vendor supplied data

Publisher Number:

2007-01-0410

Access Restriction:

Restricted for use by site license