Rotating speed detecting apparatus
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsOsamu Nakakita, Masayuki Morimoto, Takao Sakurai, Mitsugu Nakamura
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Abstract
A rotating speed detecting apparatus has: a bearing sensor configured to detect rotation of a motor and output detection pulses whose frequency depending on a rotating speed of the motor; and a calculating unit configured to receive the detection pulses from the bearing sensor. The detection pulses include a first pulse and a second pulse output next to the first pulse. The calculating unit calculates a revolution of the motor from a pulse interval between the first pulse and the second pulse.
Claims19
A rotating speed detecting apparatus comprising:
- a bearing sensor configured to detect rotation of a motor and output detection pulses whose frequency depending on a rotating speed of said motor;
- and
- a calculating unit configured to receive said detection pulses from said bearing sensor,
- wherein said detection pulses include a first pulse and a second pulse output next to said first pulse, and
- said calculating unit calculates a revolution of said motor from a pulse interval between said first pulse and said second pulse.
A vehicle comprising:
- a motor;
- a bearing sensor configured to detect rotation of said motor and output detection pulses whose frequency depending on a rotating speed of said motor;
- and
- a calculating unit configured to receive said detection pulses from said bearing sensor,
- wherein said detection pulses include a first pulse and a second pulse output next to said first pulse, and
- said calculating unit calculates a revolution of said motor from a pulse interval between said first pulse and said second pulse.
A forklift comprising:
- a motor;
- a bearing sensor configured to detect rotation of said motor and output detection pulses whose frequency depending on a rotating speed of said motor;
- and
- a calculating unit configured to receive said detection pulses from said bearing sensor,
- wherein said detection pulses include a first pulse and a second pulse output next to said first pulse, and
- said calculating unit calculates a revolution of said motor from a pulse interval between said first pulse and said second pulse.
Dependencies are inferred from the claim text.