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JP2000050688A |
To obtain variable speed equipment wherein inching operation is easily enabled. This variable speed equipment is provided with an inching processing means 5. When an inching command is valid and a starting command is inputted, accelerati...
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JP2000045988A |
To provide a lock detecting device of an inexpensive fan motor which detects locking of the fan motor using a temperature fuse containing a resistor disposed in a current-carrying circuit of the fan motor. When an air-conditioning start ...
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JP2000037005A |
To prevent a reverse voltage from being applied to a capacitor by connecting a second diode between the negative electrode side of a polar capacitor and the positive electrode side of a DC power supply and a third diode between the negat...
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JP2000032796A |
To immediately stop an engine and a motor in case of emergency by providing a path for absorbing the residual rotational energy of the generator on the upstream side of a circuit breaker for generator while branching. An electric absorbe...
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JP3001159B2 |
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JP2000023483A |
To suppress abnormal scanner control due to CPU reset during scanner driving and improve effectiveness thereof. This scanner motor controller, including a control circuit which controls driving and stopping of a motor 12 driving a docume...
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JP2000023480A |
To provide a servo controller with a regenerative power consumption circuit, capable of preventing a regenerative resistor from being burned even if power voltage increases. This controller is provided with an acceleration/deceleration c...
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JP2000014977A |
To simplify the structure and perform an operation excellent in safety in an electric washing machine using a single phase induction motor as the driving motor of a dehydration tub by controlling it so as to apply a rectified voltage con...
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JP2999003B2 |
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JP2999555B2 |
A circuit configuration for limiting the cutoff voltage occurring in controlling a servomotor (M) by means of width-modulated DC pulses comprises a power transistor (T2) which, via a capacitor (C) is connected through for a short time wh...
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JP2996012B2 |
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JPH11356073A |
To provide a motor control circuit which can rotate a motor in the direction of dissolving the nonconformity, even in case that an interlock switch works. A first diode 31 and a second diode 32 are connected in parallel with a normally c...
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JPH11356074A |
To provide an inexpensive controller which can surely stop an induction motor at power failure, and besides can surely stop a synchronous motor without a dynamic breaking or a relay. The control method for an induction motor 28 is consti...
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JPH11346493A |
To obtain a larger motor output, while protecting switching elements against thermal breakdown. Temperature sensors 19, 20, 21 are disposed as closely as possible to switching elements 12a, 13a, 14a of intense temperature rise among pair...
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JPH11341602A |
To prevent a capacitor from puncturing even if an induced voltage generated by a motor is accumulated in the capacitor, and to prevent malfunction to be caused by noise. An inverter device is provided with a motor 17 which generates an i...
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JPH11341851A |
To provide a malfunction detecting apparatus of a motor, wherein the miniaturization of its whole and the reductions of its cost and its current loss are made possible. This apparatus detects the malfunction of a motor 3 driven by an H-b...
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JPH11332269A |
To provide a regenerative brake apparatus having fewer components and a simple circuit configuration. At normal running, a regenerative switch 11 is connected to a contact C by a run controller 12 to close a normally driving circuit 13 a...
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JPH11332268A |
To return power generated when a motor decelerates to a power supply, by turning on or off the transistor of a converter according to the phase and output voltage of an AC power supply by a CPU at a DC power supply part. A DC power suppl...
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JP2982790B2 |
A stop control circuit is configured from a hardware circuit that operates independently from a CPU. When a comparison circuit outputs a matching signal, then the stop control circuit starts processes for stopping a DC motor, regardless ...
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JP2983631B2 |
PCT No. PCT/EP91/00891 Sec. 371 Date Dec. 3, 1992 Sec. 102(e) Date Dec. 3, 1992 PCT Filed May 14, 1991 PCT Pub. No. WO91/18391 PCT Pub. Date Nov. 28, 1991.Process for stopping a record-shaped, rotating information medium, for example, a ...
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JP2980469B2 |
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JP2981818B2 |
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JP2982436B2 |
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JP2977638B2 |
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JP2976714B2 |
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JPH11309290A |
To prevent the continuation of driving a sewing machine motor, the wasting of power consumption and a dangerous state of continuous up-and-down movement. When the S/S switch 25 which orders the sewing machine motor to drive and step is p...
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JPH11313469A |
To realize stopping function of the rotation of a motor and holding it at the stop position. An armature 10 is structured with components, including a rotating shaft 5, a coil 6 and a commutator 8. Fixed to the rotating shaft 5, a pair o...
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JPH11308886A |
To provide an electrically-controlled braking device which can exert a strong braking force, even in a low speed region though the device uses an electric brake. An electrically-controlled braking device is provided with a rotational dir...
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JPH11308885A |
To provide a motor controller which can improve the rotor holding force of a motor, while the motor is stopped by reducing the occurrence of vibrations and noise. A DC motor 1 is rotationally driven by supplying a DC power across the nod...
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JPH11308761A |
To protect a motor from overload by operating it with the primary current being monitored by an inverter based on the anti time-limit characteristic for the overload withstanding capacity led out from the rated value for the primary curr...
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JPH11308893A |
To utilize a general purpose inverter, by controlling an output frequency corresponding to change of an output voltage when this output voltage is higher than the lower limit voltage, and then stopping the operation of inverter when the ...
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JPH11301293A |
To accurately control the yaw moment of a vehicle in addition to saving energy consumption. Wheel motors 14, 15 composed of independently drivable electric motors are attached to lateral rear wheels RW1, RW2. A microcomputer 30 computes ...
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JP2601029Y2 |
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JPH11299276A |
To reduce the dispersion of time required, until an electric motor stops when inversion braking is executed at the stopping of the electric motor. A generation interval between a pulse signal Vpn-1 before the last pulse signal Vpn in a s...
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JPH11299274A |
To reduce the possibility of simultaneous, turning on an upper and a lower transistor in the output stage at the time of braking and thereby prevent the destruction of elements and malfunction of the circuit by cutting off the supply of ...
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JPH11299275A |
To accumulate the regeneration energy of a motor in a capacitor and to supply the regeneration power. Commercial power is given to a motor 8 from a rectification means 3 and an inverter 6 through a smoothing capacitor 5. When a first vol...
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JP2600753Y2 |
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JPH11289790A |
To achieve overheat protection only through signal processing using components indispensable for motor control as they are by calculating the heating temperature of motor winding based on the detected operating state of a motor and prote...
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JPH11289793A |
To improve power factor of power supply through suppression of harmonic while saving power of a motor by providing a motor drive with an inverter and a converter having power recovery and harmonic suppression function. The power recovery...
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JPH11289604A |
To obtain a control device which can control a braking force even when a revolution indicator is not attached to every wheel by a method wherein the speed of rotation of a motor in a braking operation is set at the specific ratio of the ...
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JPH11288649A |
To provide a motor protector which can finally avoid dangerous conditions even if contacts are fused together. A bimetal disc 8 having a movable contact 10 and opening and closing a current path by being inverted according to the magnitu...
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JP11289785A |
To provide an electric circuit which controls a relay so as to prolong the effective life of the relay connected to inductive load. Inductive load such as a motor 14, or a power source 12 is connected directly or indirectly, by the switc...
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JPH11289794A |
To provide a power supply regenerative converter which is capable of restraining fluctuations in the DC output voltage of the power supply regenerative converter at the time of regenerative operation, as well as fluctuations in the torqu...
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JPH11289785A |
To provide an electric circuit which controls a relay so as to prolong the effective life of the relay connected to inductive load. Inductive load such as a motor 14, or a power source 12 is connected directly or indirectly, by the switc...
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JP2962887B2 |
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JPH11275880A |
To raise the accuracy of rotational position by suppressing the rotation ripple caused by the change from the state of current application to a motor by PWM(pulse width modulation) to current non-application state. When a torque motor 10...
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JP2957216B2 |
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JP2957145B2 |
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JP2956091B2 |
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JP2954843B2 |
PURPOSE: To miniaturize a rotational angle limiting device which limits the rotational angle of a motor within a fixed range and to reduce the number of parts used in the device. CONSTITUTION: A pair of brushes 23a and 23b are fixed to a...
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