摘要:
A method for real time power control over a plurality of motor controllers by at least one processor on a computer system may include determining a power load demand from a first set of motors, selecting a combination of motor controllers to match the power load demand, assigning a first set of system-wide priorities, configuring a power switching network to connect the first set of motors to the motor controllers, receiving from a control unit a power request for a motor, determining a priority designation for that motor, assigning a second set of system-wide priorities, determining a second power load demand from a second set of motors, wherein the second plurality of active motors comprises the first plurality of active motors and the first motor, selecting a second combination of motor controllers necessary to match the second power load demand, and configuring the power switching network in accordance with the second set of system-wide priorities.
摘要:
Methods, computer-readable storage mediums and systems provide for designing a motor drive power system including switching mode power conversion equipment. According to aspects of the disclosure, a resonant point is shifted to a shifted resonant point by changing impedance of at least one of a feeder or a motor. An EMI filter is designed for the shifted resonant point that is at a higher frequency such that the EMI filter for the shifted resonant point is lighter as compared to an EMI filter designed for the resonant point before it is shifted.
摘要:
A synchronous brushless machine having a single exciter field stator winding. The single exciter field stator winding is energized by a high frequency alternating current to provide a single excitation field to magnetically couple with the exciter field armature winding in both the starter mode and the generator mode. With a higher excitation frequency relative to the main armature current frequency, a steady main field voltage can be achieved which improves stability control while in the starter mode. In one or more configurations, the single exciter field stator winding is driven by an H-bridge converter.
摘要:
Methods, computer-readable storage mediums and systems provide for designing a motor drive power system including switching mode power conversion equipment. According to aspects of the disclosure, a resonant point is shifted to a shifted resonant point by changing impedance of at least one of a feeder or a motor. An EMI filter is designed for the shifted resonant point that is at a higher frequency such that the EMI filter for the shifted resonant point is lighter as compared to an EMI filter designed for the resonant point before it is shifted.
摘要:
A synchronous brushless machine having a single exciter field stator winding. The single exciter field stator winding is energized by a high frequency alternating current to provide a single excitation field to magnetically couple with the exciter field armature winding in both the starter mode and the generator mode. With a higher excitation frequency relative to the main armature current frequency, a steady main field voltage can be achieved which improves stability control while in the starter mode. In one or more configurations, the single exciter field stator winding is driven by an H-bridge converter.
摘要:
A system and method for prolonging and equalizing the effective life of a plurality of transistors operating in parallel. The temperature of each transistor is measured and compared with the average temperature of the transistor system. A temperature difference is determined between the average temperature of the transistors and the measured temperature of each of the transistors. The gate resistance and the gate emitter resistance of each transistor is varied based on the temperature differences to control the measured temperature of each transistors by controlling current through each transistor thereby thermally balancing the transistors.
摘要:
Methods and systems for charging a battery string while protecting against overcharging. One system includes: a pair of disconnect devices; a power distribution bus which is electrically connected to a battery string via the disconnect devices; a battery charger connected to supply battery power to the power distribution bus for charging the battery string; a module monitoring unit configured to sense individual battery cell voltages during charging; a first processor configured to activate one disconnect device to open when the sensed individual battery cell voltages indicate overcharging; a plurality of sensors connected to sense a full-string voltage measured across the battery string and first and second half-string voltages measured across first and second half-strings of the battery string; and a second processor connected to receive sensor data during charging. The second processor is configured to independently activate the second disconnect device to open when the sensor data indicates continued overcharging.
摘要:
A method and apparatus for establishing a validated stable design (475) for a stable electrical power system (1210). An initial design (412) for an electrical power system (100) is established. The initial design (412) for the electrical power system (100) satisfies design requirements (414). The initial design (412) for the electrical power system (100) is simulated for a plurality of simulated operating conditions (426) for the electrical power system (100) to generate simulation data (421). Stability parameter requirements (436) for a stable design (437) for the electrical power system (100) are established from the simulation data (421). A hardware implementation of the stable design (437) for the electrical power system (100) is tested to generate hardware testing data (472). The stable design (437) for the electrical power system (100) is validated using the hardware testing data (472) to establish a validated stable design (475) for the electrical power system (100).
摘要:
A method and apparatus for establishing a validated stable design (475) for a stable electrical power system (1210). An initial design (412) for an electrical power system (100) is established. The initial design (412) for the electrical power system (100) satisfies design requirements (414). The initial design (412) for the electrical power system (100) is simulated for a plurality of simulated operating conditions (426) for the electrical power system (100) to generate simulation data (421). Stability parameter requirements (436) for a stable design (437) for the electrical power system (100) are established from the simulation data (421). A hardware implementation of the stable design (437) for the electrical power system (100) is tested to generate hardware testing data (472). The stable design (437) for the electrical power system (100) is validated using the hardware testing data (472) to establish a validated stable design (475) for the electrical power system (100).
摘要:
Methods and systems for protection/disconnect of high-power/energy high-voltage modular multi-string battery packs, such as battery packs for electric propulsion systems in all-electric or hybrid-electric aircraft. The methods and systems use a smart mid-point battery disconnect (14), comprising a current sensor (46) and a mid-point disconnect contactor (48), in conjunction with centralized battery management system (22). The resulting battery disconnect/protection system is configured to detect bus faults, load faults and string faults and then take appropriate action to isolate the detected fault. For example, in response to a short circuit in one battery string, the faulty battery string may be disconnected from the positive and negative busbars while the remaining battery strings continue to provide power.