Patent application number | Description | Published |
20130015803 | METHODS, SYSTEMS AND APPARATUS FOR REDUCING POWER LOSS IN AN ELECTRIC MOTOR DRIVE SYSTEMAANM ARNETT; MICHAELAACI WIXOMAAST MIAACO USAAGP ARNETT; MICHAEL WIXOM MI USAANM SCHULZ; STEVEN E.AACI TORRANCEAAST CAAACO USAAGP SCHULZ; STEVEN E. TORRANCE CA USAANM BAE; BON HOAACI TORRANCEAAST CAAACO USAAGP BAE; BON HO TORRANCE CA USAANM HITI; SILVAAACI REDONDO BEACHAAST CAAACO USAAGP HITI; SILVA REDONDO BEACH CA USAANM LI; RONGHUIAACI TORRANCEAAST CAAACO USAAGP LI; RONGHUI TORRANCE CA US - Methods, system and apparatus are provided for reducing power loss in an electric motor drive system that includes an electric machine and an inverter module. A controller determines whether a torque command (T | 01-17-2013 |
20150123578 | METHOD AND APPARATUS FOR INCREASING A CURRENT SENSING RANGE IN A POLYPHASE MOTOR SYSTEM - A method of increasing a current sensing range for a vehicle or other polyphase motor system includes measuring phase currents delivered to a motor of the system. A controller calculates an absolute value of each phase current, compares each calculated absolute value to a saturation limit to determine whether only one sensor is saturated, and extrapolates a phase current value of the saturated sensor. The calculated temporary phase current is used as the extrapolated phase current value for the saturated sensor, and a control action is executed using the extrapolated phase current value only when the calculated temporary phase current value exceeds the measured value for the saturated sensor and a sign of the calculated temporary phase current value matches that of the measured value for the saturated sensor. A system includes the motor, a power inverter module, phase current sensors, and a controller which executes the method. | 05-07-2015 |
20150229249 | ELECTRONIC MOTOR-GENERATOR SYSTEM AND METHOD FOR CONTROLLING AN ELECTRIC MOTOR-GENERATOR - A method can be used to control an electric motor-generator in order to avoid demagnetization of the permanent magnets in the electric motor-generator. The method includes the following steps: (a) receiving, via a control module, a torque command input; (b) determining, via the control module, an available torque of the electric motor-generator based, at least in part, on a rotor temperature and a magnitude of an electric current in the stator; (c) determining, via the control module, a torque command based, at least in part, on the available torque and the torque command input; and (d) commanding, via the control module, the electric motor-generator to generate torque in accordance with the torque command in order to avoid demagnetization of the permanent magnets. | 08-13-2015 |
Patent application number | Description | Published |
20140239800 | Red light-emitting nitride material, and light-emitting part and light-emitting device comprising the same - Disclosed are a red light-emitting nitride material, a light-emitting part and a light-emitting device comprising the same. The General Formula of the light-emitting material is: M | 08-28-2014 |
20140246693 | LIGHT EMITTING DIODE (LED) RED FLUORESCENT MATERIAL AND LIGHTING DEVICE HAVING THE SAME - Provided are a Light Emitting Diode (LED) red fluorescent material and a lighting device having the same. The florescent material consists of elements M, A, D, X, L and Z, wherein element M at least contains one or more than one element of Be, Mg, Ca, Sr, Ba and Zn; element A at least contains one or more than one element of B, Al, Ga, In, La, Gd, Lu, Sc and Y; element D at least contains one or more than one element of Si, Ge, C, Sn, Ti, Zr and Hf; element X at least contains one or more than one element of N, O and F; element L at least contains one or more than one element of S, Se and Te; and element Z at least contains one or more than one element of a rare earth element or a transition-metal element. | 09-04-2014 |
Patent application number | Description | Published |
20130119904 | METHOD AND SYSTEM FOR CONTROLLING MOTOR - A method for controlling a motor is provided. The method comprises obtaining electrical signals of the motor with a signal unit, the electrical signals comprising a motor torque and an angular velocity, calculating a voltage phase angle of a voltage vector with a calculating component, wherein a command torque, the motor torque, the angular velocity and a voltage amplitude of the voltage vector are inputs of the calculating component, and wherein the voltage phase angle is a variable and the voltage amplitude is a constant. The method further comprises modulating the voltage phase angle and the voltage amplitude to a switching signal for controlling an inverter; converting a direct current voltage to the voltage vector according to the switching signal, and applying the voltage vector to the motor. | 05-16-2013 |
20130249315 | SWITCHING COMPONENT AND SWITCH SYSTEM COMPRISING THE SAME - A switching component comprising a number of switch sets in parallel is disclosed herein. Each switch set comprises a number of power switches and a backup power switch in series. The backup power switch has a default position of closed. Rated powers of the power switches and the backup power switch are less than a rated power of the switching component, and the switching component is modular. A switch system comprising the switching component is also described herein. | 09-26-2013 |
20140084679 | POWER SUPPLY MANAGEMENT APPARATUS AND METHOD THEREOF - An apparatus comprising an onboard energy storage device, an onboard power conversion device configured to be electrically coupled to an external power source for receiving electrical power therefrom, and at least one drive system electrically coupled to the onboard energy storage device and the onboard power conversion device, wherein the onboard energy storage device and the onboard power conversion device cooperatively provide electrical power for the at least one drive system. A vehicle and a method for managing power supply are also disclosed. | 03-27-2014 |
20140265942 | ELECTRIC VEHICLE WITH IMPROVED ELECTRIC DRIVE SYSTEM - An apparatus includes at least one energy source and a drive system coupled to the at least one energy source. The drive system converts electrical power received from the at least one energy source and provides converted electrical power for driving at least one load. The drive system includes a first converter, a second converter, and a first switch module coupled to outputs of the first and second converters. When the apparatus is operating under a first mode, the first switch module is switched to assume a first state to allow a first output electrical power provided from the first converter and a second output electrical power provided from the second converter to be combined for driving a first load with the combined output electrical power. | 09-18-2014 |
20140277884 | DRIVE SYSTEM AND METHOD FOR DRIVING A VEHICLE - A drive system includes a control unit and a traction device. The control unit is configured to receive a load variation signal indicating a vehicle load is to be or being changed and generate a traction torque in response to the load variation signal. The traction device is coupled to the control unit and configured to drive a vehicle according to the traction torque. | 09-18-2014 |
20150081152 | APPARATUS AND METHOD FOR ELECTRIC BRAKING - The present invention discloses an apparatus comprising an energy source, a first motor, a second motor and a control system. The first motor is configured to drive a first load and the second motor is configured to drive a second load. The control system is coupled to the energy source, the first and the second motors. The control system dumps the baking power generated by the first load at least partially on the first motor according to a first baking command. The control system dumps the baking power generated by the second load at least partially on the second motor, according to a second baking command. The present invention also discloses other varieties of apparatuses, vehicles, such as electric tractors, electric forklifts and relative methods, etc. | 03-19-2015 |
20150102667 | PROPULSION SYSTEM AND METHOD FOR DRIVING A VEHICLE - A propulsion system includes a traction drive system, a boost converter, an energy-type energy source, a power-type energy source, and an energy management system. The boost converter includes a high voltage side and a low voltage side. The boost converter is coupled to the traction drive system on the high voltage side. The energy-type energy source is coupled to the boost converter on the low voltage side thereof. The power-type energy source is coupled to the boost converter on the low voltage side thereof. The energy management system is coupled to the boost converter and configured to control the energy-type energy source and the power-type energy source through the boost converter in at least two conditions during a motoring mode. | 04-16-2015 |
20150120130 | VEHICLE CONTROL SYSTEM - A system includes a contactor system, a vehicle control unit, and a fault diagnostic system. The contactor system includes one or more contactors. The vehicle control unit is coupled to the contactor system via a first connection and a second connection. The vehicle control unit is configured to provide a controlling signal to the contactor system through at least one of the first connection and the second connection to control the one or more contactors. The fault diagnostic system is configured to identify faults occurring in the first connection and the second connection. A method is also provided. | 04-30-2015 |