摘要:
Disclosed herein is a novel norbornene, acrylate or methacrylate monomer as a photoresist monomer containing an oxepan-2-one group. Further disclosed are photoresist compositions comprising a polymer prepared from the monomer, methods for preparing the photoresist compositions, and methods for forming photoresist patterns using the photoresist compositions.
摘要:
Disclosed herein is a novel norbornene, acrylate or methacrylate monomer as a photoresist monomer containing an oxepan-2-one group. Further disclosed are photoresist compositions comprising a polymer prepared from the monomer, methods for preparing the photoresist compositions, and methods for forming photoresist patterns using the photoresist compositions.
摘要:
Entry of a synchronous speed of a rotor can be facilitated by increasing a starting torque by adjusting a magnetization application time for magnetizing the rotor according to whether or not a starting capacitor is used. The present invention includes: a control unit that outputs a control signal for controlling an application time of a magnetizing current according to whether or not a starting capacitor is used; and a switch that supplies power to an exciting coil according to the control signal outputted from the control unit.
摘要:
An apparatus for controlling a motor includes an inverter to convert a DC voltage into an AC voltage, a power selecting circuit to select external power or power from the inverter, and a controller to control operation of the power selecting circuit according to a load of the motor.
摘要:
A self-magnetizing motor incorporates a control circuit that starts the motor, controls a magnetizing unit, and then operates the motor. The control circuit can include relay, such as a bi-directional conductive power semiconductor device, and one or more PTC (Positive Temperature Coefficient) switches. This control circuit eliminates the need for a separate controller and the implementation costs can be reduced.
摘要:
Provided are a self magnetizing motor and a method for winding coils on a stator thereof, wherein two exciter poles are positioned at an inner circumferential surface of the stator to face each other, and an exciter magnetizable portion is disposed at an outer circumferential surface of a rotor to thus be selectively magnetized by the exciter poles, whereby the self magnetizing motor can be operated by an induced electromotive force generated by a main coil, a sub coil and a conductive bar of a rotor from its initial driving to a speed prior to a synchronous speed, and operated by a magnetomotive force generated by the exciter poles and the exciter magnetizable portion at the synchronous speed, thereby improving an efficiency of the motor, a power factor, and a synchronization characteristic.
摘要:
An apparatus and method for controlling starting of a motor are disclosed. An exciting coil of a motor is excited by using a controller of an electronic refrigerator without having an extra excitation control circuit, to thereby simplify a component construction for controlling exciting of the motor and thus reduce complexity. The present invention includes: a main coil and an auxiliary coil (sub-coil); an exciting coil that generates an excitation current; a refrigerator control unit that outputs a control signal for controlling an application time of the excitation current when started; and a switch unit electrically connected with the exciting coil and supplying power to the exciting coil according to the control signal outputted from the refrigerator control unit.
摘要:
An exciting coil of a motor is formed to be controlled by using an analog timer, to thus control an excitation control circuit of a motor control apparatus, whereby an excitation control circuit which excites the exciting coil of a motor control apparatus can be simplified and complexity can be reduced by simplifying a circuit construction of an excitation controller. The apparatus includes an auxiliary winding (sub-coil) and a main winding (main coil), and an exciting device electrically connected with the auxiliary winding and the main winding, determines an excitation application time and an excitation time and generates an excitation current according to the determined excitation application time and the excitation time.
摘要:
A self magnetizing motor and a compressor having the same is configured to require a lower starting voltage and to deliver superior performance. In the self magnetizing motor, a magnetic material on an exterior of the rotor is magnetized when power is supplied to a magnetizing unit of the stator. A plurality of conductive bars are inserted on the outer circumference of the rotor core. A spacing distance between outer portions of the conductive bars and inner circumference of the magnetizable material is longer than an air gap between the stator and the rotor. As a result, a magnetic strength of the magnetic material may be increased.
摘要:
A magnetizing motor having a permanent magnet body covering an outer circumferential surface of a rotor body, includes a speed detecting unit that detects a speed of the magnetizing motor; and a controlling unit that compares the speed detected by the speed detecting unit with a reference speed, and outputs a magnetizing control signal based on the result of the comparison.