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JP2757704B2 |
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JP2756432B2 |
To provide a novel method for starting an elevator machine device using a synchronous motor. Power is fed to a synchronous motor 2 via a frequency converter 11, a traction sheave 12 is connected to the motor 2' and an elevator 18 is caus...
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JPH10136673A |
To provide a control circuit having an electronic switch for energizing and de-energizing the winding of a motor. A control circuit for a two-speed motor M contains an electronic switch C for high speed and an electronic switch for low s...
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JPH10136679A |
To provide an improved control circuit for a two-speed motor. This control circuit for a motor is provided with a starting coil 42, a low-speed operation winding 24 and a high-speed operation winding 16. According to whether a motor M is...
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JPH10136680A |
To improve precision of the change-over point motor speed by automatically compensating the change of a motor current, which is caused by a power supply voltage and the temperature change of a motor winding. When the temperature in a mot...
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JPH10127073A |
To start a load within a time causing no strange feeling in an operator after throwing in a switch by connecting a constant voltage diode between the output end of a diode bridge and a second capacitor, thereby securing the charging curr...
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JPH10127075A |
To obtain a stationary device for starting a gas turbine with reduced cost. A gas turbine starting stationary device has a voltage setting equipment 12 for outputting a setting voltage signal to a comparator and an adder according to a s...
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JP2570788Y2 |
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JPH10112990A |
To prevent power source short circuit which is to be caused by the phenomena that, even when instantaneous stop is generated during stationary operation wherein connection of the winding of a motor is a delta, a voltage is again applied ...
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JP2742371B2 |
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JP2741490B2 |
To provide a transmission device for a motor-driven curtain, in which a shock given to the transmission device for a motor-driven curtain is absorbed to prevent breakage of the respective parts. This transmission device for a motor-drive...
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JPH1098891A |
To release the fixed state of a driving device without being large-sized by a method wherein the releasing device which is composed of an external- force application means for releasing is constituted in the driving device. When a start ...
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JPH1094279A |
To increase a torque in a starting operation and to reduce power consumption in a rated operation by a method wherein a peak current flowing to a capacitor induction motor is detected, whether the peak current is larger than the output o...
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JP2737892B2 |
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JPH1084685A |
To provide a controller for controlling the rotational direction in a two-pole AC motor, in which the motor is rotated electrically in one direction. A two-pole AC motor includes magnetic poles 2a and 2b made of N- and S-poles of a perma...
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JP2566958Y2 |
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JP2731275B2 |
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JPH1075590A |
To avoid the instantaneous power supply voltage fluctuation caused by a current applied to a motor circuit at the time of the start of a motor and avoid the malfunction of an IC circuit by a method in which a current supplied to the moto...
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JP2724222B2 |
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JPH1066369A |
To make DC brush-type motors operable even when the durability of the brushes of the motors is deteriorated or the contact between the commutators and brushes of the motors is imperfect by driving the motors at normal rotating speeds dur...
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JP2721263B2 |
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JP2719149B2 |
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JP2718892B2 |
PURPOSE: To damp the vibrations of load positively even at the time of a soft start and a soft stop by connecting switching elements in antiparallel with each phase of a power supply path and controlling the phase-control angles of each ...
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JPH1052078A |
To provide a driving device for a vibration actuator which can generate a sufficiently strong vibrating force even when the device has a small size and a very small diameter and is driven with a battery, by providing a pulse transmitting...
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JP2563101Y2 |
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JP2716051B2 |
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JPH1047255A |
To provide a driving device of a motor-driven compressor, by which even if there is differential pressure, a motor-driven compressor can be started. A driving device of a motor-driven compressor comprises a switch 1, a battery 3, an inve...
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JP2713104B2 |
PURPOSE: To provide a door which can be driven by a power supply having predetermined capacity regardless of the number thereof and a power supply therefor. CONSTITUTION: In a power supply comprising a control unit 2 for feeding power to...
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JPH1042469A |
To provide a power supply system in which the adverse effect of voltage drop can be minimized at the time of starting a motor. In a power supply system where the secondary bus 4 of a transformer 1 is connected with a base load and an ind...
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JPH1032958A |
To improve the adaptability of the switching angle of a switching gear for the target stroke of a movable member that can travel in the on/off device of a drive device for driving the movable member that can travel between reference posi...
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JPH1032989A |
To provide a drive unit for a vibration actuator, which is small, whose diameter is extremely small, which is driven by a battery and by which a sufficient vibrating force can be obtained. A portable apparatus which is driven by a batter...
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JPH1032995A |
To provide a drive unit for a DC motor, which can prevent an arc from being generated at the contact of a relay which changes over the polarity of an armature current. A transistor TR1 is connected across a DC power supply 1 and a change...
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JPH1028390A |
To suppress the input current of the inverter of the driver of an apparatus within a certain range, for avoiding the adverse influence upon the power supply side, regradless of the load state of the inverter and the existence of the inpu...
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JPH1028391A |
To control the revolution of a synchronous machine stably, even if the repulsive torque is low. A position detector 17 detects the position of the armature of a synchronous machine, in accordance with a position detection signal, outputs...
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JP2704515B2 |
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JP2703656B2 |
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JP2704263B2 |
This invention relates to a motor output change-over control unit used for a main shaft operating motor of a machine tool. A conventional unit of this kind produces a wide range constant motor output by gears, and a main shaft operating ...
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JPH1023772A |
To control the rotation stop time of a motor at the time of changing the direction of rotation of the motor, by forming a drive blank signal for a fixed period of time from the start edges of forward and backward signals, and forming a m...
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JP2698678B2 |
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JPH1014268A |
To obtain a longer switching frequency life than that in the past, without increasing the capacity of a star electromagnetic contactor MCS or a delta electromagnetic contactor MCD. After the output of a star electromagnetic contactor MCS...
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JP2697825B2 |
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JP2558785Y2 |
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JP2692747B2 |
PURPOSE:To allow the total wiping angle as the sum of slip angle and wipe command angle to approach a constant value by measuring the time in which a wiper blade passes the wipe command angle, and emitting a drive signal so that the slip...
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JPH09325819A |
To stop the running of a motor when a large change is generated in the count value of an up/down counter at the time of starting the running of the motor. Inspecting positional data find out based on multi-rotation data obtained immediat...
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JPH09327191A |
To make it possible to develop relatively strong magnetic force by a stator at the start-up and lessen the power consumption by keeping a switching circuit in a first state until a predetermined period of time passes after a power switch...
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JPH09322575A |
To reduce a voltage drop rate, by a method in which the secondary voltage of an on site transformer is stepped up to a predetermined high voltage higher than a rated voltage when a 1st manual switch is closed, and a feeding breaker is cl...
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JPH09317689A |
To decrease rush current generated when a motor is started, by starting the motor at lower voltage than a predetermined voltage, and increasing voltage gradually up to the predetermined voltage after starting or increasing voltage within...
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JP2686304B2 |
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JP2554422Y2 |
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JPH09294387A |
To make it possible to reduce the size by contacting a positive temperature coefficient thermistor for motor starting by contacting it to the inner wall surface of a case through a flat plate-shaped contacting portion formed at a connect...
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