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JPH1181798A |
To stop a door automatically and prevent the generation of an accident by flowing the current of a backup power supply through a control section when a current is not flowed through the control section of a power door at the time of serv...
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JPH1181824A |
To provide a constitution in which necessary electric energy to be supplied from an external power supply can be restricted. As a motor drive part 4 supplies a pulse current to a motor, the motor is rotated. As the motor is rotated, a bl...
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JP2872400B2 |
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JP2872210B1 |
[wrap up] [Task] When a three-phase AC power supply voltage that exceeds the DC voltage value of the smoothing capacitor is input, the voltage and current of the three-phase AC power supply should not be distorted. The diodes D1 to D6 of...
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JP2870211B2 |
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JPH1171959A |
To carry out proper correspondence and disposal to overload detection by setting a constant region in front of a totally closed place as a second overload detecting region. Pulse numbers generated by a first speed sensor 10a until a half...
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JPH1175391A |
To stop a rotor at a target stop position without an error regardless of a cogging torque. A nonvolatile memory 25 is connected to a control circuit 22. Current ratio modes concerning the stopping at target stop positions are stored in t...
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JPH1175386A |
To provide a brushless DC motor which does not need excessive wirings and terminals, has a simple construction, facilitates the size reduction and has a protective device. A three-phase power is supplied from a motor driving circuit unit...
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JP2868648B2 |
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JPH1169612A |
To provide a protective device, for a motor drive circuit, which prevents a discharge current from creeping into a control element due to, e.g. a mixed contact or the like and which prevents the damage of the control element. The motor c...
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JPH1169880A |
To restrain vibration of DC voltage, by forming a torque command correction part which restrains rising in DC voltage by reducing regenerative torque in raising DC voltage applied to a filter capacitor with an operating torque command us...
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JPH1169504A |
To realize by reducing a cost a constitution which generates large regenerative brake torques quickly at emergency times, in a regenerative brake force control device for an electric vehicle. A motor 98 is connected to drive wheels FL, F...
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JP2864039B2 |
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JPH1151454A |
To enable an appropriate control of a fan motor by preventing operation of the fan motor from being stopped owing to fluctuation of load of the fan motor in an air conditioner. Direct current voltage is subjected to switching by an inver...
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JPH1155977A |
To provide a control circuit for capacitor motors which is simply constituted and capable of applying electromagnetic braking to a capacitor motor. In a drum washer, if a dewatering time passes after a pause button is turned on in a dewa...
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JP2861781B2 |
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JPH1141962A |
To prevent damages to a motor and improve the durability of a motor controller, by supplying a reverse drive current to an armature opening a window glass and a forward drive current for to an armature closing a window glass. When a wind...
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JP2856253B2 |
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JPH11501799A |
PCT No. PCT/DE96/00199 Sec. 371 Date Sep. 11, 1997 Sec. 102(e) Date Sep. 11, 1997 PCT Filed Feb. 9, 1996 PCT Pub. No. WO96/28883 PCT Pub. Date Sep. 19, 1996A circuit for operating an electric motor (10) has a triac (24) that is parallel ...
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JPH11501496A |
PCT No. PCT/EP94/03261 Sec. 371 Date May 26, 1995 Sec. 102(e) Date May 26, 1995 PCT Filed Sep. 7, 1994 PCT Pub. No. WO95/09478 PCT Pub. Date Apr. 6, 1995A braking circuit for a universal motor is proposed, in which, during braking, the a...
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JPH1127972A |
To prevent huntings by serially connecting a control circuit which controls energizing the exciting coil of an electromagnetic brake to hold and release a rotating shaft, and a coil having an inductance component between the exciting coi...
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JPH1127971A |
To set a decelerating point, corresponding to lowering operating speed subjected to constant output control for loading and unloading operations with high efficiency regardless of the magnitude of load by controlling the lowering speed o...
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JP2852142B2 |
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JPH1118464A |
To brake a motor in the case of power failure, without attaching a dedicated brake circuit by utilizing the regenerative resistance of a regenerative processing circuit and a switching means which passes regenerative current through the ...
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JPH1118486A |
To suppress the overvoltage at DC section by detecting an instantaneous rush current flowing from the AC side into the DC side of a power converter through a transformer and operating a plurality of choppers, arranged in parallel dependi...
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JP2849266B2 |
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JP2848605B2 |
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JP2845366B2 |
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JP2847034B2 |
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JPH117322A |
To locally manage information from a sensor, to immediately stop a motor when a state that the motor should be stopped is detected, and to allow a master to know it through a communication bus. A switchgear constituted of a breaker and a...
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JP2844066B2 |
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JP2840841B2 |
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JP2841879B2 |
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JPH10341582A |
To provide a motor controller equipped with a regenerated excessive energy detector which can contrive the compatibility of the quality improvement of the device and the cost down, by performing the real-time monitoring of regenerated en...
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JPH10341592A |
To provide a regenerative control equipment which regeneratively stops an inverter without problems which necessitates regenerative stopping to inverters connected with a DC power source constituted of a power rectifier. A multiplier 12 ...
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JPH10336804A |
To perform regenerative power generation while obtaining a good engine brake effect. Drive wheels 7 of a vehicle are provided with a second motor 8 so that an engine 1 and the device power can be combined. A basic regenerating amount tab...
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JPH10337091A |
To detect the power failure of an AC power source, within an inverter, and reopen the operation of the motor at a proper point of time at recovery from the power failure, in an inverter for motor drive where an electromagnetic contactor ...
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JP2839256B2 |
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JP2839589B2 |
A circuit arrangement for braking a series motor is proposed, in which at least a part of the field windings is supplied with a continuous current supplied on the input side. As a result, particularly for motors with a comparatively larg...
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JP2834943B2 |
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JP2834288B2 |
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JPH10323085A |
To perform meandering operation during stop for giving no shock to a real load, by carrying out meandering operation by an exciting current when the revolutions exceed a certain limit after the input of a stop signal during the rotation ...
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JPH10320052A |
To miniaturize the entire runaway obstruction device by providing a reduction gear and two light shielding type photosensors in a servo motor. A reduction gear 9 engaged with a gear 8 for a servo motor rotary shaft is provided and a CCW ...
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JPH10322893A |
To shorten the detection time and the interrupting time as compared with a conventional monitor by performing the monitoring through analysis or comparison of motor current or voltage of a driver. An AC voltage obtained from a transforme...
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JPH10317791A |
To accurately detect nipping regardless of fluctuation in driving voltage supplied to a motor and variation of speed of a motor resulting from the mechanism of a door. This power window device with a safety device is so constructed that ...
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JPH10305983A |
To reduce the extent of watt consumption in the regenerative power consumption resistance of an inverter unit. Both main circuit DC terminals of two upping and downing inverter units 1A and 1B controlling and driving an up-down escalator...
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JP3053715U |
A description of a method and a device for monitoring the braking of a D.C. motor of a printing machine such as a sheet-fed offset printing machine is given. For safety purposes, in the case of an emergency stop an electrical braking sho...
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JP2823238B2 |
PURPOSE:To allow an induction motor to shift to a regenerative braking mode quickly by being equipped with a rectification circuit, a no-current detection circuit to detect. that the current is O by an output signal of this rectification...
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JPH10295091A |
To obtain an apparatus for guaranteeing the level of residual magnetic flux of the magnetic field of a stator by constituting a damping circuit which is arranged between a power source and an operating winding, including a switching circ...
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JPH10290594A |
To provide a motor control circuit where the downsizing and simplification of a circuit are possible by sharing the parts sharable for normal and reverse rotation. At normal rotation, when a switch SW is turned on toward normal rotation ...
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