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9035587 Motor control loop with fast response  
A system and method of controlling a motor are disclosed. The system comprises a current observer for observing a motor current at a sampling rate and a proportionate-integral controller that...
8970150 Apparatus for detecting the position of a rotor of an electric motor and related method  
An apparatus detects the position of a rotor of an electric motor having three phases and a plurality of windings. The apparatus includes circuitry configured to connect at least two of said...
8963456 Power converter and power converter of rolling stock  
A power converter includes a first electric power conversion unit having an inverter for converting a first DC electric power to an AC electric power, an AC circuit connected to the first electric...
8901866 Motor drive apparatus equipped with energy storage unit  
A motor drive apparatus includes an AC/DC converter which converts AC power supplied from a power supply to DC power, a DC/AC converter which converts DC power to AC power and vice versa, a DC...
8760098 Sensorless motor control  
An method for driving a motor is provided. A plurality of pulse width modulation (PWM) signals are generated from a commanded voltage signal and a commanded angle signal, and these PWM signal are...
8730613 Retracting an actuator  
An apparatus and associated methodology for retracting a first member in relation to a second member. The first member may be selectively moveable by a first motor and the second member may be...
8648554 Electric motor car control system  
An embodiment of an electric motor car control system includes a resistor connected parallel to a main motor cut-off switch, or a switch for grounding terminals of the main motor, to discharge...
8633669 Electrical circuit for controlling electrical power to drive an inductive load  
A method and system are disclosed for controlling electrical current through an inductive load. The electrical current is supplied by one of at least three selectable dual capacitor bank...
8614557 Control of an electric machine  
A method of controlling an electric machine that includes sequentially exciting and freewheeling a winding of the electric machine. The winding is excited in advance of zero-crossings of back emf...
8502487 Motor energy recycling device  
A motor energy recycling device is connected to a motor, a voltage regulating power capacitor, and a switch unit, for storing energy released by the motor. The motor energy recycling device...
8362722 Power converter device  
A power converter device for achieving a stable braking operation, preventing excessive current to flow therein, when conducting DC braking on a permanent synchronous motor, comprises: a switching...
8253361 Device for the controlled power consumption of electric drives in machinery and machine including the device for processing printing material  
A device for controlling electric drives in machinery includes an electronic control unit for calculating in advance the electric power required by the at least one electric drive as a function of...
8143830 Brushless motor apparatus  
A blushless direct current (BLDG) motor apparatus includes: a stator which is provided with a plurality of windings corresponding to N phases and wound in parallel independently of each other; a...
8076877 System and method for controlling power balance in an electrical/mechanical system  
An electrically commutated actuator and control system has a stator and a shaft that is movable with respect to the stator. A plurality of magnets movable with the shaft provide a first magnetic...
8040094 Voltage clamping and energy recovery circuits  
A circuit for use with a stator winding of a rotating or linear electrical machine, the stator winding having a number of coils linked by the same number of points of common coupling, includes an...
7965053 Measurement of speed and direction of coasting permanent magnet synchronous motor  
A method for determining the speed of rotation of an unpowered, coasting electric motor, driven, when powered, by an electronic inverter, and without activating switches of the inverter. The steps...
7880418 Electromechanical drive system, in particular for progressive cavity pumps for oil wells  
The following invention is an electromechanical system (1) that is to be connected to an electricity supply (7), comprising: an electric machine (2) that can operate as an independent generator...
7800327 Sensorless control in a permanent magnet machine  
An apparatus and method for providing improved sensorless control of permanent magnet motors is described. Induced electricity from at least one winding set is used to determine rotor position and...
7408318 Motor drive unit  
A motor drive unit is adapted to detect a motor lock-up condition (in which an electric motor is accidentally locked during driving) based on the fact that motor drive current increases in that...
7285930 Method and device for controlling a multiphase electronically commutated motor  
A method is specified for controlling a multiphase motor that is commutated by an inverter-side bridge circuit, in the course of which a particularly precise and technically simple detection of a...
7202620 Apparatus and method for dissipating a portion of the commutation derived collapsing field energy in a multi-phase unipolar electric motor  
A multi-phase unipolar motor is configured such that each stator pole is formed with bifilar wound primary and inductively associated secondary windings corresponding with one phase. The primary...
7122984 Method for identifying an overload current of an electric drive  
The invention relates to Method to detect a sluggishness or the blocking of an electric drive (3), which is triggered via a power semiconductor component (7). The electric drive (3) can be...
7105972 Controller and magnetically driven wheel for use in a radial/rotary propulsion system  
The radial/rotary propulsion system of the present invention features a flywheel having concentric rings of permanent magnets attached to one or both sides or embedded into the flywheel. These...
6989644 Regenerative braking system and method using air conditioning system of electric vehicle  
The regenerative braking method and system for an electric vehicle in which regeneration current is calculated and controlled using control of an air conditioning system to consume a portion or...
6888328 Quasi bipolar topology for brushless motors  
A circuit 100 for a five phase DC brushless motor includes a first coil A and a first primary switch S1 for controlling current through the first coil; a second coil B and a second primary switch...
6888327 System for protecting a power semiconductor output stage that switches an inductive load  
A system for protecting a power semiconductor output stage that, as a function of a control signal, connects an inductive load to a direct-current supply voltage and disconnects it therefrom....
6771035 Method and device for determining the rotor position of an electric motor with several motor strings  
The specification describes a method and a detection module for determining the rotor position of an electromotor having a plurality of motor phase windings, in which, for determining the rotor...
6222333 DC brushless motor controller apparatus and method  
A low cost, microprocessor (U1) based motor controller (10) for driving a half-wave, multiple speed, reversible, DC brushless motor (30) directly from standard AC 50/60 Hz power. A large number of...
6140782 Brushless DC fan driver with overshoot voltage prevention and enhanced operational efficiency  
A fan driver is provided to drive a DC brushless fan. The fan driver has a pulse generator for receiving a signal indicating the phase of a rotor in the fan from a Hall element and generating two...
6081103 Method for regulating the excitation current in a motor vehicle alternator by digital processing, and a regulating device for carrying out the method  
The excitation current in the rotor winding of a motor vehicle alternator is regulated by this method. The alternator produces a rectified output voltage to be regulated, this output voltage being...
6066930 Synchronous driving method for inductive load and synchronous controller for H-bridge circuit  
In flowing a switching current through an inductive load by way of an H-bridge circuit, a control circuit and a timing signal generating circuit are used to start a current supply operation in...
6034493 Brushless DC motor control  
An electronically commutated brushless DC motor primarily for fractional horsepower applications of the type where at any instant one motor winding is unpowered and used to detect back EMF...
5998957 Dissipativity-based controller for synchronous electric drives, and associated methods  
The invention provides a controller for specifying a drive voltage for synchronous motors relative to a desired speed profile. The controller senses motor current and optionally senses motor...
5982130 Calibration technique to remove series resistance errors in the sensed back EMF of a motor  
A motor controller controls a motor's rotational speed using sensed back electromagnetic force (back EMF) of the motor. The sensed back EMF is presumed to contain an error component caused by...
5982155 Method for regulating the excitation current in a motor vehicle alternator by digital processing, and a regulating device for carrying out the method  
The method of regulation includes: starting to measure the rectified voltage at the output of the alternator during each period T of this voltage, performing this measurement by sampling over a...
5982133 Brushless motor with rotor position detection compensation caused by induced voltage in rotor  
A brushless motor having at least one current influence detector (10a, 10b, 10c) for detecting influence of an induced voltage caused by variations of current flowing in an armature winding (3)....
5977739 Stepping motor provided with a drive control integrated circuit having a prestored operating pattern  
A drive control integrated circuit for controlling a motor, such as a stepping motor, a servo motor, or the like, which is operated by pulse signals, comprising: a memory circuit which stores...
5973469 Motor driving apparatus  
It is an object of this invention to attain reliable starting characteristics and stable rotation performance of a motor in a motor of a phase synchronization driving type. To achieve this object,...
5973460 Power output apparatus and method of controlling the same  
A power output apparatus of the invention includes a clutch motor (30) and an assist motor (40) that allow energy output from an engine (50) driven at a driving point of high efficiency to be...
5969496 Method of controlling operation of synchronous motor and motor control apparatus for the same  
At the time of starting a synchronous motor (40), one method of the present invention assumes that the synchronous motor (40) rotates at a revolving speed of not less than a predetermined level,...
5969919 Drive unit for electric motor  
A drive unit for driving an electric motor includes two motor drive circuits disposed in parallel and each consisting of a bridge circuit of switching devices each incorporating a reverse blocking...
5967205 Portable wood planing machine with switched reluctance motor  
An improved portable wood planing machine for the surface planing of wooden planks or boards is provided. The machine has a switched reluctance motor. In an exemplary embodiment, the planing...
5962999 Method of controlling a torque ripple of a motor having interior permanent magnets and a controller using the same method  
Torque ripples of a motor having interior permanent magnets can be reduced through the following method and the torque ripple controller using the same method: first, drive the motor having a...
5963706 Control system for multi-phase brushless DC motor  
The motor control system is operable with multi-phase bipolar parallel winding brushless DC motor. The motor control system includes multi-phase bipolar H-bridge circuits which change current flow...
5962996 Inverter apparatus  
In an inverter apparatus for converting a direct current to an intermittent current by a converter configured by parallel-connected plural pairs of serially-coupled switching elements, resistance...
5959421 Motor direction control device for electromotive vehicles  
A motor direction control device id used for electromotive vehicles which has an electric motor adapted to cause the vehicles to move forwards and backwards. The motor direction control device...
5959420 Heat engine and electric motor torque distribution strategy for a hybrid electric vehicle  
A method is provided for controlling a power train system for a hybrid electric vehicle. The method includes a torque distribution strategy for controlling the engine and the electric motor. The...
5954779 Drag torque control method in a diesel electric drive system and drive system  
A method for influencing the drive torque in a drive train comprising at least one electric motor at least indirectly driving one driven wheel, an internal combustion engine, and an electric...
5955861 Sensorless switched reluctance motor driving apparatus and method thereof  
A sensorless switched reluctance motor (SRM) driving apparatus comprising: a phase control unit for outputting a start or stop command signal for the SRM and a speed command signal to set rotation...
5955860 Method of determining electrical angle and apparatus for the same  
The prior art technique should return the voltage applied to a synchronous motor to zero in the process of measurement of an electrical angle. This causes foreign noises. The structure of the...
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