Panasonic Corporation

Kiyotaka Tanimoto

Hideki Nishino

Shiro Sakiyama

Takashi Morie

Yoshiaki Igarashi

Kouji Okamoto

Hitoshi Kobayashi

Akira Kawabe

Akio Yokoyama

Shinichi Kuroshima

Fumiaki Senoue

Taishii Iwanaga

A actuator driver includes a digital filter configured to perform phase compensation of a digital torque command signal using a fed-back digital signal; a digital PWM generator configured to generate a plurality of pulse-width modulated PWM control signals in response to an output of the digital filter; at least one H bridge configured to select and output a first or second terminal voltage in response to the plurality of PWM control signals; first and second continuous time &#x394;&#x3a3; A/D converters configured to convert the first and second terminal voltages from analog to digital, respectively; and a feed-back filter configured to decimate outputs of the first and second continuous time &#x394;&#x3a3; A/D converters to feed back the digital signal to the digital filter.

Actuator driver

A three-phase DC brushless motor and coil winding method provide a coil winding enabling consistent starting with PWM sensorless driving by suppressing the DC offset component of the induced voltage resulting from an imbalance in the motor coil windings. The method of winding the armature winding of the three-phase DC brushless motor renders the difference in mutual inductance substantially zero.

Three-phase DC brushless motor and winding method

Growing community of inventors

Kanagawa, Japan

Kiyotaka Tanimoto