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JPH11178389A |
To perform generation damping by providing a back bias diode between a collector and an emitter of a pair of transistor for each phase of coil winding, and by forming a damping current path through one of the transistors at a positive or...
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JP2914301B2 |
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JP2910517B2 |
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JPH11168898A |
To positively and quickly detect a locked state by outputting a control signal to a drive means, by controlling a drive means according to each detection value of the rotation and actuation current of a DC machine, and judging the locked...
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JPH11164589A |
To enable, if an instantaneous power interrupt or a power interrupt occurs in a power supply, prevention of free-running of a motor and decelerate and stop the motor within a fixed time, through inexpensive, simple constitution. If an in...
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JPH11164472A |
To provide a motor controller by which a motor itself and its peripheral apparatuses can be protected from damages due to the heat of the motor, without the increase in size and cost of equipment. A motor unit 4 to which a power is suppl...
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JPH11162311A |
To provide such a relay for overload protection that a protector part and a thermoswitch part are integrated, or otherwise, even separated ones, the parts and manufacturing lines can be used in common. In the relay 1 for overload protect...
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JP2905119B2 |
A washing machine includes a hollow tub shaft mounted on a first stationary portion of the machine for rotation, a rotatable tub rotatably mounted on an upper end of the tub shaft, an agitator shaft concentrically inserted in the tub sha...
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JPH11155296A |
To suppress an increase in the input voltage of a regenerative converter on power recovery by stopping operation of a first switching element and the regenerative converter on the power failure of a main power supply, and at the same tim...
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JPH11155230A |
To provide an overload protection device for a motor control device, capable of predicting in advance a state nearing an overload and which does not cause a machine or a plant of stop suddenly. A detected value 1 of a load is inputted to...
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JP2902613B2 |
To specify and release a descent position of an electric blind easily by rotating a motor by a descent command, lowering the blind by winding a stringlike member back, and setting descent height by a dip switch based on a counted value. ...
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JP2902826B2 |
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JPH11150970A |
To control the speed of a single-phase induction motor braking it electronically, by adjusting the firing angle of a thyristor in a drive circuit, if the speed of the single-phase induction motor becomes higher than a set speed. If the s...
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JPH11150971A |
To obtain an electric braking device for rotating electric machines capable of obtaining braking force properly, even for a rotating electric machine using a brushless exciter. When parallel off of a rotating electric machine 1 is perfor...
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JP2898236B2 |
To provide a method and a device to detect a stall condition of a motor on an electric assist steering system. A stall detector 70 decides existence of a stall condition by monitoring a torque command signal 48 to correspond to steering ...
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JP2595440Y2 |
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JPH11136982A |
To provide a brake unit for induction motor which can generate a brake torque surely while preventing continuous rotation of rotor when a motor is braked by applying a half-wave rectified voltage. This brake unit for an induction motor 1...
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JP2892800B2 |
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JPH11127587A |
To positively and extremely rapidly invert a rotational direction in a single-phase induction motor through which speed is controlled. In the case where a single-phase induction motor 1 with a speed detector 3 is operated in a forward or...
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JP2888671B2 |
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JP2888670B2 |
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JP2890091B2 |
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JPH11122961A |
To positively control the drive of a motor. An element (a capacitor D11) is provided, which absorbs an inrush current and prevents semiconductor elements such as light-emitting diodes D1 and D2 and transistors Q1 and Q2 from malfunctioni...
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JPH11117604A |
To immediately stop the opening and closing operation even if a person is caught in the opening and closing door by causing the opening and closing door to discharge when a peson touches the opening and closing door, and stopping the ope...
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JPH11117471A |
To reduce the number of limit switches and to reduce cost. An electric roof light window is composed of an overload detection circuit 204 to detect overload generated when a sliding door is totally opened to disconnect energization to a ...
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JPH11107623A |
To reliably fully close an expansion type gate by eliminating unreliability when the full closed state of the expansion type gate is detected by a limit switch by disconnecting energization through detection of the overload of a drive mo...
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JPH11107622A |
To reduce a work executing cost by a method wherein a limit switch to detect the full closing state of an expansion contraction gate is eliminated through cut-off of energization through detection of the overload of a drive motor and a w...
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JP2885385B2 |
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JP2884269B2 |
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JP2882590B2 |
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JP2880808B2 |
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JP2880777B2 |
A washing machine includes a brushless motor, a position sensing element for sensing a rotational position of a rotor of the motor, a motor drive control circuit composed of an inverter main circuit for driving the motor and an inverter ...
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JP2881433B2 |
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JPH1198873A |
To provide such a vibration generator that its starting torque can be reduced and, accordingly, the starting kVA and rated capacity of an induction motor can be reduced from the conventional examples and, at the same time, does not requi...
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JPH1198681A |
To ensure protection of a motor and a motor drive, by calculating a value on the temperature of a motor coil or a motor drive driver stage based on motor coil current, voltage and inductive voltage, and limiting or inhibiting motor drivi...
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JPH1192059A |
To provide a lift for construction in which a large power to drive a motor can be secured for lifting the body of a heavy weight without requiring power receiving facilities requiring troublesome procedures such as application for authri...
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JPH1193043A |
To provide a means for the revolution control in a loom and a system therefor, capable of improving woven fabric productivity through the combined use of a brake in a speed-reducing control operation so as to realize a sharp speed reduct...
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JPH1193847A |
To provide a compressor overload preventing device capable of preventing the inadequate interruption of the drive of a compressor caused by a power supply condition. This compressor overload preventing device is provided with a revolving...
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JPH1193516A |
To prevent drawing by actuating a windowpane by providing an auto-up latch circuit, an auto-down latch circuit, a motor and the driving circuit, and an auto-up-off circuit. When a car is inundated with water, an auto-up latch circuit 19 ...
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JP2876842B2 |
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JP2876170B2 |
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JPH1189265A |
To surely control a regenerating resistor so that the resistor may not be burnt by overheating. An overheating detecting circuit is provided with an electrolytic capacitor C1 provided at a DC supplying terminal, a regenerating resistor R...
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JPH1189260A |
To provide a conduction controller which can actuate an electromagnet that operates the braking device of electric equipment, such as the motor- operated hoist, etc., under the same condition regardless of the conducting voltages. Conduc...
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JPH1189262A |
To provide a motor drive control circuit which can surely control the drive of a motor. In a motor drive control circuit, a PTC element 4 provided with heating radiating bodies (heat radiating plates 5 and solder) is used as a breaking m...
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JPH1189264A |
To quickly discharge a capacitor input type maincircuit power source by only adding a discharge program by making the residual voltage of a capacitor to be discharged by making a current to flow to a closed circuit to a motor in the main...
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JPH1189261A |
To provide a motor drive control circuit which can surely control the drive of a motor. A motor drive control circuit is composed mainly of a lead relay LR which is provided with lead switches L1 and L2 having lead pieces LS1 and LS2 as ...
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JPH1189083A |
To propose a motor controller which can accurately estimate the coil temperature of a motor and draw out the performance of the motor sufficiently. Based on a power Pi applied to a motor and a motor output Po, the temperature change (dTm...
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JPH1189300A |
To provide a shifter which has improved the time efficiency in shifting. A shifter is equipped with an elevator basket 1 which is elevated and lowered by the drive of the induction motor 7 controlled by a vector control inverter 8, an en...
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JPH1181837A |
To prevent burning of a drive circuit by changing a duty factor when it is judged that a motor is in an overload condition until a condition amount drops below a specified value and comparing the maximum value of a specific condition amo...
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JPH1184268A |
To realize traveling in a short time with minimum impact and vibration by applying a driving current to a coil in a moving period, reversing a current direction and alternately repeating an electric attenuation period and a period when a...
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