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US 7,923,958 B2Granted
Apparatus and method for driving 2-phase SRM motor
AssigneeLG Electronics Inc.
InventorSang-Young Kim
Life of this patent
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AssigneeLG Electronics Inc.
InventorSang-Young Kim
Estimating the term…
An apparatus and method for driving a 2-phase SRM are provided. The method may include initializing 2-phase SRM based on a detected position of a rotor by an initializing sensor at a time of an initial driving, and normally driving the 2-phase SRM based on a detected position of the rotor by a driving sensor. With this method, a sufficient amount of torque is generated when the 2-phase SRM is driven at a high speed. The apparatus may include an initializing sensor that detects each position of each phase of a 2-phase SRM, and generates an initializing sensor signal based on the detected result; a driving sensor that detects each position of each phase of the 2-phase SRM, and generates a driving sensor signal based on the detected result; and a microprocessor that initially drives the 2-phase SRM based on the initializing sensor signal at the time of an initial driving, and normally drives the 2-phase SRM based on the driving sensor signal at the time of a normal driving.
An apparatus for driving a 2-phase SRM (switched reluctance motor), the apparatus comprising:
A method for driving a 2-phase SRM, the method comprising:
An apparatus for driving a 2-phase SRM (switched reluctance motor), the apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Characterised by the kind of motor: reluctance motors
For starting dynamo-electric motors or dynamo-electric converters: for starting an individual reluctance motor
Control or regulation of electric motors, electric generators or dynamo-electric converters
About 1 year 3 months of term left · ends 31 Jan 2028 (estimated)
The present invention relates to a 2-phase SRM (switched reluctance motor), and more particularly, to an apparatus and method for driving a 2-phase SRM by individually using an initializing sensor for an initial driving and a driving sensor for a normal driving.
In the conventional method for driving a 2-phase SRM, two position sensors are used to detect each position of a rotor, and generated sensor signals serve to initialize and drive each phase.
FIG. 1 is a view schematically showing a construction for detecting a sensor signal of a 2-phase SRM. As shown, the 2-phase SRM comprises a 4-pole stator 10, a 2-phase rotor 11, a rotor shaft 12 connected to the center of the rotor 11 for transmitting a rotary motion of the rotor, a 2-phase shutter 13 rotatably connected to the rotor shaft 12, 1-phase and 2-phase sensors 14a and 14b for detecting a position of the shutter 13, and a sensor signal generator 15 for generating 1-phase and 2-phase sensor signals from signals detected by the 1-phase and 2-phase sensors 14a and 14b.
FIG. 1 is a configuration view schematically showing a 2-phase SRM for detecting each sensor signal;
FIGS. 2 to 5 are views showing sensor signals according to each position of a rotor of the 2-phase SRM;
FIG. 6 is a curve showing a torque according to a driving method for the 2-phase SRM in accordance with the conventional art;
FIG. 7 is a block diagram showing a configuration of an apparatus for driving a 2-phase SRM according to the present invention.
As shown, the apparatus for driving a 2-phase SRM according to the present invention comprises an initializing sensor 71a, a driving sensor 71b, a microprocessor 72, an oscillator 73 and a multiplying unit 74.
The initializing sensor 71a detects a position of a rotor of the 2-phase SRM at the time of an initial driving, and outputs an initializing sensor signal based on the detected result.