|
Match
|
Document |
Document Title |
|
|
US20090255278 |
Refrigerant System With Variable Speed Drive
A refrigerant system ( 10, 100, 200 ) is provided with a power control system ( 30, 130, 230 ). The power control system adjusts the speed of the motors driving the refrigerant system components...
|
|
|
US20090067203 |
THREE PHASE INVERTER WITH IMPROVED LOSS DISTRIBUTION
An inverter circuit couples a DC voltage source having a primary side and a reference side to an electric motor or other AC machine having multiple electrical phases. An inverter circuit includes...
|
|
|
US20090066271 |
METHOD AND SYSTEM FOR CONVERTING DC POWER TO AC POWER
Methods and systems for converting direct current (DC) power to alternating current (AC) power are provided. A first phase of the AC power is generated based on a first carrier signal. A second...
|
|
|
US20090021208 |
On-line measurement of an induction machine's rotor time constant by small signal d-axis current injection
A controller continually updates rotor time constant estimation of an induction machine by interrogating the induction machine with a small signal oscillation and monitoring the response. The small...
|
|
|
US20080272731 |
METHOD AND SYSTEM FOR RESOLVER ALIGNMENT IN ELECTRIC MOTOR SYSTEM
Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor...
|
|
|
US20080265833 |
Driving level control structure eliminating electric noise from motor
A driving level control structure eliminating electric noise from motor includes a drive control unit, a sensing unit, a setting unit, a first comparing unit, and a frequency control unit. The...
|
|
|
US20080218118 |
Efficiency Maximization Control and Variable Speed Drive of Single Phase Induction Motors
A control method and a control system for single phase induction motors driven by two-power electronic switch inverter are disclosed. The system fulfills two main tasks i.e. precise motor speed...
|
|
|
US20080197800 |
REDUCTION OF SUBHARMONIC OSCILLATION AT HIGH FREQUENCY OPERATION OF A POWER INVERTER
A control architecture for an electrical inverter includes a synchronous frame current regulator and a stationary frame current regulator. The stationary frame current regulator receives input...
|
|
|
US20080185986 |
Low noise heating, ventilating and/or air conditioning (HVAC) systems
A heating, ventilating and/or air conditioning (HVAC) system includes a system controller, a motor controller, an air-moving component, and a permanent magnet motor having a stationary assembly, a...
|
|
|
US20080169783 |
INDUCTION MOTOR CONTROLLER
The present invention provides an induction motor controller which includes: a circuit for generating a d-axis current reference signal from a d-axis current command value and a periodically...
|
|
|
US20080164836 |
Static Frequency Converter with Automatic Function for Optimizing Magnetic Flux and Minimizing Losses in Electric Induction Motors
“STATIC FREQUENCY CONVERTER WITH AUTOMATIC FUNCTION FOR OPTIMIZING MAGNETIC FLUX AND MINIMIZING LOSSES IN ELECTRIC INDUCTION MOTORS”, having an automatic function for regulating and controlling...
|
|
|
US20080166246 |
System for protecting bearings and seals of a refrigerant compressor
To protect the bearings, lubricant and seals of a refrigerant compressor, the compressor includes one or more inductors for mitigating a high frequency common mode current that produces a high...
|
|
|
US20080157709 |
HIGHLY RESPONSIVE PERMANENT MAGENT MOTOR CONTROLLER
Current command values are used instead of detected current values to estimate axis error by calculation. An axis error command value is generated according to a speed command value, and a...
|
|
|
US20080157710 |
BEAT-LESS CONTROLLER FOR PERMANENT MAGNET MOTOR
In a driving system for an inverter that uses a diode rectifying circuit to convert a single-phase or three-phase AC voltage to a desired DC voltage and drives a permanent magnet motor, a...
|
|
|
US20080116842 |
Method and apparatus for motor control
A system and method for controlling a permanent magnet motor are disclosed. Briefly described, one embodiment receives a torque command and a flux command; receives information corresponding to a...
|
|
|
US20080100257 |
Electric motor system implementing vector and slip control
A system is provided for controlling an electric machine. The system has a power source configured to supply electric energy to the electric machine. In addition, the system has an inverter...
|
|
|
US20080094021 |
Mitigation of Harmonic Currents and Conservation of Power in Non-Linear Load Systems
An AC power controller system applies three-phase AC operating power to an induction motor that drives a non-linear mechanical load. A primary low pass filter is connected in series between branch...
|
|
|
US20080067970 |
INDUCTION MOTOR CONTROLLER
An induction motor controller that may include three phase paths leading from a power input to a power output, a solid-state switching device interposed between the power input and the power output...
|
|
|
US20080054841 |
SYSTEM AND METHOD FOR ADJUSTABLE CARRIER WAVEFORM GENERATOR
A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform...
|
|
|
US20080048606 |
VECTOR CONTROLLER FOR A PERMANENT MAGNET MOTOR AND INVERTER MODULE
In a system in which current is detected in an inexpensive manner or in a system in which a position detector is omitted, the present invention provides a high-efficiency vector controller for a...
|
|
|
US20080042614 |
Motor control unit
A motor control unit including a rotational position detector detecting a rotational position of a brushless DC motor; a current detector detecting a current of the brushless DC motor; a coordinate...
|
|
|
US20080018296 |
Motor control device
A motor control device that controls a permanent-magnet synchronous motor has: a magnetic flux controller that derives, as a specified excitation current value, a specified current value...
|
|
|
US20080007198 |
CONTROL APPARATUS FOR AC ROTARY MACHINE
A control apparatus is for controlling an AC rotary machine which includes a first and second stator elements and a rotor, in which the first stator element can be turned, or offset, in a...
|