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7398012 |
Method for powering mining equipment
Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a...
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7386224 |
DC brushless fan motor driving circuit
A DC brushless fan motor driving circuit has a Hall PWM signal generator, a speed signal generator, a PWM driver and a full-bridge switching circuit. The Hall PWM signal generator obtains a Hall...
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7123821 |
DC motor
A DC motor includes a power source, a stator and a rotor. Permanent magnets are mounted to either the stator or the rotor. Electromagnets are mounted to the other of either the stator or the rotor....
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6895176 |
Method and apparatus for controlling electronically commutated motor operating characteristics
A permanent magnet DC brushless motor control assembly permits a user to select the permanent magnet DC brushless motor operating characteristics by selecting appropriate control circuits to...
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6693400 |
Multi-mode motor controller chip set
A multi-mode motor controller architecture includes a motor, an integrated circuit controller, and an integrated circuit driver circuit. The integrated circuit controller includes a pulse...
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6449427 |
Loading drive system
Upon receipt of a reference voltage signal Vi and a multiplicity of logic control signals L 1 and L 2 , the loading drive system converts the signals received into a first control voltage Vi 1 ...
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6359414 |
Method for controlling a reluctance motor
A method for controlling a reluctance machine, particularly a switched reluctance machine by use of a torque controller, in which motor windings are switched on as a function of the rotor angular...
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6353705 |
Speed control circuit of a direct current motor
A speed control circuit of a direct current motor comprises a switching regulator IC 10. The switching regulator IC 10 is composed of a reference voltage generator 12 which generates a...
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5754020 |
Wiper-washer system for vehicles
A wiper-washer system for vehicles comprises at least one wiper drivable by a wiper motor and a washer device which includes a water reservoir and a water pump motor. The wiper and water pump...
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5408575 |
Automotive fan controller
A vehicle fan motor controller includes a simple planar ceramic base providing a plurality of printed resistors. The resistors include electrically conductive paths printed on the ceramic...
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4479079 |
Apparatus for varying the speed of DC motors
The commutator of a DC motor is uniquely constructed to include at least one dead segment at least as wide as the associated brush (brushes). A silicon controlled rectifier (SCR) is arrranged in...
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4288729 |
Control system for D.C. electric motor
A control system for a D.C. electric motor utilizing a Ward-Leonard rotation speed control system in which noise components in the input power to the motor are substantially eliminated. Switching...
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4247808 |
Method and apparatus for varying the speed of DC motors
The commutator or commutators of a DC motor are uniquely arranged with a plurality of peripherally spaced, current carrying segments separated by relatively large, electrically dead, non-conducting...
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4236103 |
Control circuit for a direct current motor
A control circuit for a direct current electric motor including a rectifying bridge for supplying the motor with direct current and a regulating circuit including a triac, the energizing angle of...
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4232258 |
Speed control apparatus for electric motor
A direct current obtained by rectifying an alternating current voltage by means of a diode bridge circuit is applied to a direct current motor connected to the diode bridge circuit. Use is made of...
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4225812 |
Electric motor control system
An electric motor of predetermined voltage rating is connected to an electric current supply source higher in voltage than the rated motor voltage in series with a voltage dropping resistor...
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4137490 |
Trigger speed control switch
A speed control subassembly is made by providing a generally flat heat sink plate having a laterally-formed collector strip at its upper edge. A double-sided-adhesive insulator tape strip is stuck...
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4121142 |
Full-wave bidirectional DC motor drive circuit
The present invention is a DC motor drive circuit in which each end of a center tapped supply transformer is connected through a pair of back-to-back thyristors to corresponding ends of a center...
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3993942 |
Forced commutation chopper having current limit
A forced commutation chopper control for regulating speed of a DC series tractive motor limits peak motor current by sensing the voltage across the commutation capacitor during the on-time of the...
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3988656 |
Motor speed control for power tool
In a hand-held electric power tool, a combination including an electromotor, and an electric circuit for controlling the speed of the motor, including a pressure switch for controlling the motor...
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3956688 |
Remote control phase shift circuit for thyristor
A control circuit for a motor includes a thyristor connected to apply current to the motor, and a phase shift circuit for controlling the thyristor including a series RC circuit connected in...
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3935522 |
Control device for the electric fan
A control device for an electric fan comprising a power supply, a control means, a trigger pulse generator and a switch means, all connected in circuit with the motor of the electric fan, wherein...
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3931558 |
SCR motor speed control system with trigger stabilization circuit
A circuit is disclosed for controlling and regulating the speed of a D.C. motor fed from a single-phase A.C. supply. A full-wave power bridge using two diodes and two silicon controlled rectifiers...
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3909734 |
Reference signal generator, particularly for the control of a direct-current motor
A reference-signal generator, particularly for the control of a direct-current motor, comprising a regulated voltage source supplying one of the inputs of a fast and sensitive comparator whose...
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3845379 |
CHOPPER CIRCUIT FOR D.C. MOTOR
An improved chopper circuit for controlling a direct-current motor having a free-wheeling diode, comprising an oscillating circuit consisting of a series combination of a reactor and a capacitor...
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3817451 |
AIR CONDITIONER CONDENSING SYSTEM CONTROL
An air conditioner condensing system control having a motor driven means for flowing cooling air in heat transfer association with a condenser thereof. The operation of the motor is controlled by a...
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3777239 |
VOLTAGE REGULATOR FOR DC POWER SOURCE
In a DC power source in which a silicon controlled rectifier is connected in series with a DC circuit of a single phase AC bridge rectifier so that the phase of the firing angle may be controlled...
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3743908 |
FIRING CONTROL CIRCUIT FOR GRID-CONTROLLED SWITCHING DEVICES
A circuit having a grid-controlled rectifying means with a selectively variable firing angle, having a logic circuit for generating firing pulses including a first firing pulse at a predetermined...
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3721879 |
POWER CONTROL FOR PORTABLE ELECTRIC TOOL
A trigger operated switch unit for incorporation within the housing of a portable electric motor powered tool has power control and by-pass switches and a rotary potentiometer all controlled and...
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3671836 |
POWER CONVERSION CONTROL SYSTEM
A static power conversion system for converting alternating current electric power to direct current power by means of controllable rectifiers is provided with control apparatus for controlling the...
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3670226 |
DEVICE FOR THE CONTROLLED ACTUATION OF THE BASKET OF A WASHING MACHINE
A speed governing device for washing machines for overcoming the defect of generating radiofrequency noises without using any filter. In addition, the device exploits the advantages of DC motors in...
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3648142 |
INFINITE SPEED CONTROL SWITCHING DEVICE FOR USE WITH ELECTRIC MOTORS IN PORTABLE TOOLS
A trigger-operated power control switch for electric motors in portable tools, wherein control circuitry including a condenser, a fixed resistor, a silicon-controlled rectifier, a neon tube, and a...
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3641410 |
TOUCH CONTROL FOR ELECTRICAL APPARATUS
A touch control to energize the load of a tool or appliance. A timing circuit gates a triac ON to energize the load in response to a touch or touch device having no moving parts. The touch device...
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3639822 |
SOLID STATE POWER CONTROLLER FOR DC PERMANENT MAGNET AND SHUNT FIELD WINDING MOTORS SUPPLIED FROM AN AC SOURCE
A solid state switching circuit and power controller for permanent magnet and shunt field winding motors used in portable power tools and the like. The power controller employs a bidirectional...
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3638090 |
DRIVING ARRANGEMENT FOR THE DRUM OF A WASHING MACHINE
1. In an automatic washing machine including a commutating electric motor for driving the drum of the washing machine at a first comparatively low-washing speed and at a second comparatively...
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3624476 |
ELECTRONIC DEVICE FOR REGULATING THE FEED OF A DC MOTOR, ESPECIALLY INTENDED FOR THE ELECTRIC TRACTION OF VEHICLES
Regulation of the speed, current and torque of a DC motor is effected by a novel inverter-oscillator combination controlling the charge on a capacitor, the discharge of which serves to block a...
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3619753 |
THYRISTOR CIRCUITS
A thyristor circuit has an inductive load and a first thyristor connected in series across a DC source. Connected across the first thyristor is an inductor, a second thyristor and a capacitor, and...
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3599764 |
SHAFT SPEED CONTROL SYSTEM COMPRISING CLUTCH AND BRAKE
A control circuit for use in a motor drive utilizing selectively electromagnetically actuatable clutch and brake devices. The operating speed of a drive shaft of a utilization device is maintained...
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3586948 |
METHOD AND AN ARRANGEMENT OF CONTROLLING A DC MOTOR ON CONSTANT SPEED
A speed control circuit, electrically in parallel with a controllable semiconductor, which is electrically in series with a DC motor, said control circuit including an RC circuit in which the...
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3575652 |
MOTOR CONTROL CIRCUIT WITH SEMICONDUCTOR SWITCHING MEANS AND TRANSFORMER AND CAPACITOR BIASING MEANS
An electric motor is connected to a direct current electrical power source through a silicon controlled rectifier that is cyclically turned on by a triggering circuit and turned off by a...
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3562616 |
CONTROL SYSTEMS FOR ELECTRIC MOTORS
A motor drive circuit in which a direct current motor is fed with pulses of current by means of a controlled rectifier connected as a power switch between a power source and the motor. The...
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3562617 |
MALFUNCTION DETECTOR CIRCUIT FOR A SOLID STATE ELECTRIC MOTOR CONTROLLED VEHICLE
A control circuit for a battery powered vehicle including circuits for detecting the failure of a pair of contacts in a high-speed circuit to open, the failure of a silicon controlled rectifier...
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3551774 |
CURRENT LIMITING CIRCUIT FOR A SOLID STATE D.C. MOTOR CONTROL CIRCUIT
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3549973 |
SINGLE-PHASE COMMUTATOR MOTOR SPEED CONTROLLING DEVICE
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3546556 |
UNIVERSAL POWER CONTROL MODULE FOR PORTABLE TOOL OR APPLIANCE CONTROL SYSTEMS
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3536973 |
SWITCH AND SPEED CONTROL FOR ELECTRIC MOTOR
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3530503 |
SOLID STATE CHOPPER FOR CONTROLLING LOAD CURRENT
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3518520 |
SPEED CONTROL CIRCUITS WITH LINE VOLTAGE COMPENSATION FOR D.C. MOTORS
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3517291 |
ELECTRIC MOTOR SPEED CONTROL
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3492557 |
STATIC SWITCHING CONTROLLERS FOR EFFECTING CONNECTION TO A D.C. ELECTRIC MOTOR AND DISCONNECTION FROM THE MOTOR OF A BATTERY
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