6results about How to "High inverter efficiency" patented technology

The utility model relates to a kind of phase-locked loop of power supply system, and power supply system includes multiple ac power supply;Phase-locked loop includes rectifier module, DC-AC module and output terminal, the number of input of rectifier module is equal to the number of ac power supply, the input of rectifier module is electrically connected to the output terminal of ac power supply one by one, the input of DC-AC module is electrically connected to the output terminal of rectifier module, the input of output terminal is electrically connected to the output terminal of DC-AC module.This application is switched by multiple ac power supply and supplies power, DC-AC module carries out phase-locked state, ensure that there is no phase difference phase angle problem when load equipment is automatically switched.

The present invention provides a motor control method, which includes: a step of calculating an ideal position of a motor rotor based on a Hall sensor signal; a step of calculating a current position of the motor rotor based on a rotation speed of the motor rotor; and a step of calculating a difference between the ideal position of the motor rotor and the current position of the motor rotor as a Hall sensor deflection angle.

The utility model belongs to electrical equipment, and particularly relates to a silicon carbide inversion induction heating power supply, which comprises a three-phase input circuit, a voltage chopper circuit, a silicon carbide inversion circuit, an output circuit and a connection relation thereof. The high-frequency induction heating power supply adopts the silicon carbide inverter, has the characteristics of large single-tube current, high switching speed, low on-resistance, low failure rate, small switching loss, high temperature resistance and the like, and greatly improves the inversion efficiency and reliability of the high-frequency induction heating power supply; an RDC inversion absorption plate is designed and is specially designed for high-frequency inversion of the SiC module, and due to the fact that the switching speed of the SiC module is high, high voltage can be generated when the SiC module is switched on and off, and the RDC inversion absorption plate can be used for absorption in time; a transformer RC absorption assembly is further designed, is connected in parallel to the two ends of a primary winding of the isolation transformer and is used for absorbing high-frequency parasitic oscillation generated by the primary side of the transformer, preventing the output end of the inverter bridge from generating high-frequency parasitic oscillation current, reducing oscillation current of the SiC module and reducing heating of the SiC module.

The utility model discloses a high-efficiency grid-connected inverter with good stability, which comprises an inverter body, a shell is arranged on the outer wall of the front surface of the inverter body, a connecting port assembly is arranged at the bottom of the inverter body, and a rotating protection mechanism is arranged on the back surface, close to the connecting port assembly, of the inverter body. A shell is arranged on the outer wall of the front face of the inverter body, cooling fins are fixedly connected to the outer wall of the back face of the inverter body, a prompt panel is arranged on the front face of the shell, and the connecting port assembly comprises a grid-connected wiring port, a PV port, a direct-current switch, a WIFI interface and a 485 communication interface. And the PV port, the DC switch, the WIFI interface, the 485 communication interface and the grid-connected wiring port are fixedly connected to the outer wall of the bottom of the inverter body from left to right. According to the utility model, the problem that the connection port assembly is easy to oxidize or loosen in the use process is effectively solved, and the effect of protecting the stable operation of the grid-connected inverter is achieved.

The present invention discloses a method, device, controller and storage medium for adjusting the bus voltage of an inverter. The method comprises: obtaining the maximum duty cycle of the inverter, the peak voltage of the power grid and the inverter output current; obtaining the estimated value of the bus voltage based on the maximum duty cycle of the inverter, the peak voltage of the power grid and the inverter output current; adjusting the estimated value of the bus voltage to determine the target bus voltage; adjusting the duty cycle of the DC / DC converter in the inverter based on the target bus voltage so that the output bus voltage is consistent with the target bus voltage. The technical solution of the present invention adjusts the output bus voltage of the inverter to be consistent with the target bus voltage, and obtains an accurate and reasonable output bus voltage that can be stably output, thereby improving the inverter efficiency.

The heat dissipation structure comprises an inverter body and a wind scooper, one side of the wind scooper is open, the other side of the wind scooper is provided with an air inlet, at least part of the inverter body is arranged in the wind scooper, and one side, facing the air inlet, of the inverter body is provided with a plurality of heat dissipation fins. According to the utility model, the air flow generated by the fan of the engine can be used for carrying out forced heat dissipation on the inverter to strengthen the heat dissipation of the inverter, and the service life of components in the module is prolonged by reducing the working temperature of the inverter, so that the inversion efficiency of the module can be improved, and the power generation power can be improved.