Matches 1 - 43 out of 43
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7609016 Systems and methods for driving a motor  
A control system includes a controller configured to provide a drive signal, and a switching device configured to generate an output control signal as a function of the drive signal in an on-state...
7586276 Electronically commutated motor and method for controlling the same  
The invention relates to an electronically commutated motor ( 10 ) and to a method of controlling an electronically commutated motor ( 10 ). In order to reduce commutation noise, it is proposed to...
7550937 Method for detecting initial magnetic pole position in permanent-magnet motor  
A method for detecting initial magnetic pole position in permanent-magnet motor first determines a PWM pulse width Dt applied to stator, where the PWM pulse width Dt depends on motor parameters....
7511441 Semiconductor integrated circuit, drive circuit, and plasma display apparatus  
A semiconductor integrated circuit capable of reducing the influence of the difference in ambient temperature etc. and realizing a stable phase adjustment circuit has been disclosed. The...
7288922 Control apparatus for automotive alternator having capability to accurately detect temperature of alternator  
A control apparatus for a vehicle generator includes a switch, a regulator, a fault condition detector, and a PWM signal generator. The switch is selectively turned on and off so as to...
7288906 Manually operated brushless direct current motor  
A manually operated brushless DC motor is disclosed herein, which is an educational electric motor and can overcome the shortcoming hard to visualize the movement of a motor due to the high-speed...
7288905 Integrated circuit and method for trainable control and operation of DC motor  
A method and device for control of a low-cost DC motor such as that suitable for portable or battery-powered applications are disclosed such that an intended behavior for the motor may be...
7230400 Electronically commutated motor  
In an electronically commutated motor (M), rotor position signals are generated by means of a galvanomagnetic rotor position sensor ( 40 ). A timer (CNT_HL) brings about an advanced commutation...
6611117 Drive circuit for a brushless DC motor  
A drive circuit for a brushless DC motor controls at least one of a number of possible operation features of the motor. The drive circuit includes a driver stage for providing a current for a...
6580235 Electric motor with two modes of power supply switching  
An electronically switched motor includes a stator-rotor assembly fitted with three-phase driving windings, a series of switches for powering the windings, and a control circuit suitable for...
6570351 Sensorless motor driving apparatus  
When a rotor of a brushless motor 1 is at rest, excitation is performed three times such that excitation phase is switched each time an excitation is performed thereby to ensure that the rotor...
6512342 Brushless motor driving device  
A brushless motor driving device is so configured to control excitation of each phase armature coil an the basis of starting patterns supplied from a start circuit in a starting operation and a...
RE37825 Data storage device having a drive mechanism for rotating a data storage medium  
A data medium is driven by a brushless direct current motor and possesses control signals on a track which can be picked up by a sensing device and supplied to a switch arrangement for activation...
6356042 Engine shut off system for a hybrid electric vehicle  
An engine shut off system for a hybrid electric vehicle includes an internal combustion engine, an electric motor, and a controller. The internal combustion engine is located in the hybrid electric...
6271638 Brushless D. C. motor and control assembly  
An energy efficient low-power integral electronically commutated fan motor and control circuit assembly mounted on a circuit board for use in refrigerators utilizing a Hall sensor to provide...
6239563 Electronic starting and operating control system for a single-phase synchronous motor with a permanent magnetic rotor, also in case of failure  
Control of the start-up and operation of a single phase synchronous motor with a permanent-magnet rotor (9) is proposed, wherein the single-phase synchronous motor (1) comprises at least one stator...
6239564 State advance controller commutation loop for brushless D.C. motors  
A method and system for advancing the state of commutation of an electronically commutated brushless D.C. motor. Impending motor stall is detected by measuring current flow through the motor...
6160367 Apparatus and method for driving motor  
An apparatus and method for driving a motor with a reduced current flowing in the motor, as well as reduced vibrations of the motor at a start-up is provided. The motor driving apparatus has a...
6150779 Motor drive apparatus and method  
A motor drive apparatus for driving a motor with power derived from a main power source, including a signal input device configured to input a start signal and a stop signal to initiate starting...
6034496 Motor speed control using fixed-duration torque bursts  
A motor controller controls motor rotational speed by repeatedly executing a sequence of operations. Initially, a pulse is generated that causes a predetermined fixed current to be supplied to the...
5726546 Agitation period control of laundry machine motor  
A laundry washing machine in which the period of each agitation stroke (comprising "ramp", "plateau" and "coast" phases) is controlled by adjusting the "coast" phase of each stroke in order to...
5550447 Pulse generating system responding to instruction pulses for generating driving pulses for diving motor  
A pulse generating unit responds to a series of instruction pulses to generate a series of driving pulses which includes alternately occurring first driving pulses and second driving pulses. The...
5459385 Variable reluctance drive system  
A variable reluctance drive system including a motor and corresponding converter for improved current commutation is described. The motor incorporates a salient pole rotor and a salient pole stator...
5397972 Start-up procedure for a brushless, sensorless motor  
A method for starting-up in a desired forward sense of rotation a multiphase, brushless, sensorless, DC motor, while limiting the extent of a possible backward rotation. First, a predetermined...
5376866 Motor controls, refrigeration systems and methods of motor operation and control  
A method of operating a brushless motor having a stationary assembly with at least two different energizable windings for producing spaced apart magnetic fields in time sequence, and a rotor...
5298838 Sensorless brushless DC motor starting system and method  
A method for starting a sensorless brushless DC motor. The present invention uses the physical equations of motion of the motor to calculate commutation advancement rates during the motor's...
5221881 Method and apparatus for operating polyphase DC motors  
A circuit for operating a polyphase dc motor, for example of the type having a plurality of "Y" connected stator coils, has circuitry for unambiguously determining the actual instantaneous position...
5206567 Apparatus for reliably activating sensorless and brushless DC motor  
When a sensorless and brushless DC motor is started, the rotor having a magnet is positioned by first exciting one pair of motor coils and then exciting another pair motor coils. The excitation of...
4983894 Brushless motor driving system  
In a system for driving a brushless motor having motor drive coils connected to respective drive transistors, voltages induced in the drive coils when the motor is rotating are continuously...
4922169 Method and apparatus for driving a brushless motor  
An n-phase, m-pole (wherein n and m are integers) brushless motor is driven without use of physical rotary position detectors, such as Hall elements or the like. An harmonic component of back emf...
4882523 Direct current motor commutation control  
A method and circuit arrangement for controlling the commutation of coil sets of a direct current motor with a fixed sensor, in which a sensor signal (S1) having a first period (T1) related to the...
4642536 Control system for an electronically commutated motor, method of controlling such, method of controlling an electronically commutated motor and laundry apparatus  
Control system for an electronically commutated motor (ECM). The ECM includes a stationary assembly having a plurality of winding stages adapted to be selectively commutated, and rotatable means...
4549120 Turntable dc brushless motor stopping control  
A drive motor control device for a video disk player or the like operates to brake the motor by driving it reversely upon reception of a rotation termination signal, until it is detected that the...
4510422 DC Motor soft-start circuit  
A DC motor driving circuit includes an exciting coil switching circuit for selecting from among polyphase exciting coils of a brushless motor those coils to be excited and their excitation...
4495450 Control device for brushless motor  
A control device for brushless motor comprises an inverter (3), a control circuit (8) and a rotor position detecting circuit (9). In the rotor position detecting circuit (9), voltage induced in...
4484114 Self-starting brushless DC motor  
A self-starting DC motor includes first and second main windings and a rotor. A starting winding is angularly offset from the first and second main windings for aligning the rotor offset from the...
3849718 METHOD FOR CONTROLLING A RECTIFIER CIRCUIT WITH CONTROLLED RECTIFIERS AND ASSOCIATED QUENCHING DEVICES  
In a method and corresponding circuitry for controlling a rectifier circuit having a controlled rectifier, the controlled rectifier is fired at an electrical angle α and is quenched at an...
3845339 PERMANENT MAGNET ROTOR ELECTRIC MOTOR  
An electric motor, particulary a collectorless D.C. motor, has a stator including a support portion having a passage and a generally plate-shaped winding arrangement fixedly mounted on the support...
3842332 FIVE-PHASE STEPPING MOTOR SYSTEMS  
In the system disclosed, five stator windings of a stepping motor are connected in series with each other to form a loop having five connecting points. Control means switch five transfer switches,...
3840761 AXIAL AIR GAP, COLLECTOR-LESS D-C MOTOR  
A stator structure, for example an insulating board, has at least one, preferably two or more flat coils located thereon, transverse to the axis of the motor. An axially magnetized, permanent...
3838322 INDUCTION MOTOR SYSTEM WITH CONSTANT HORSEPOWER  
An electric induction motor/control system that provides the desirable high starting torque and wide speed characteristics of direct current motors. The stator of the induction motor has two...
3833841 PRIME MOVER WITH INTERNAL POWER SOURCE  
A prime mover utilizing an internal direct current power source. The preferred source is a battery adapted to convert energy from spontaneous nuclear disintegration into electrical current. Such a...
3794895 ELECTRIC MOTORS WITH ELECTRONIC COMMUTATION  
The motors are supplied by DC current and comprise two coils wound at 90.ree. on a stator, the motor coil being supplied by a power amplifier, whilst the detector coil delivers a detector signal...
Matches 1 - 43 out of 43