Vector control invertor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorMasanori Tanimoto
Life of this patent
Estimating the term…
Abstract
A vector control inverter comprises at least one of a set of a torque estimating unit that estimates an output torque of a motor from excitation current and torque current and a pulse transmitting unit that outputs a torque estimation value estimated by the torque estimating unit as positive-negative identifiable pulse stream signals, and a set of a pulse array input unit that receives pulse stream signals input from outside as positive and negative values and a torque instruction converting unit that converts the received pulse stream signals into a torque instruction to be transferred to the motor as a torque.
Claims9
A vector control inverter comprising:
- a speed detecting unit that detects a rotation speed of a motor;
- a current detecting unit that detects a primary current applied to the motor from an inverter circuit;
- a current converting unit that splits the primary current into an excitation current and a torque current;
- a calculating unit that calculates an excitation voltage and a torque voltage based on the rotation speed;
- a voltage converting unit that outputs a three-phase output voltage from the excitation voltage and the torque voltage;
- a modulating unit that outputs, based on the three-phase output voltage, a signal to control switching devices of the inverter circuit;
- an estimating unit that estimates an output torque of the motor from the excitation current and the torque current;
- and
- a pulse transmitting unit that outputs the output torque as a positive-negative identifiable pulse stream signal.
A vector control inverter comprising:
- a speed detecting unit that detects a rotation speed of a motor;
- a current detecting unit that detects a primary current applied to the motor from an inverter circuit;
- a current converting unit that splits the primary current into an excitation current and a torque current;
- a calculating unit that calculates an excitation voltage and a torque voltage based on the rotation speed;
- a voltage converting unit that outputs a three-phase output voltage from the excitation voltage and the torque voltage;
- a modulating unit that outputs, based on the three-phase output voltage, a signal to control switching devices of the inverter circuit;
- a pulse stream inputting unit that receives a pulse stream signal from outside;
- and
- a torque instruction converting unit that converts the pulse stream signal into a torque instruction.
A vector control inverter comprising:
- a speed detecting unit that detects a rotation speed of a motor;
- a current detecting unit that detects a primary current applied to the motor from an inverter circuit;
- a current converting unit that splits the primary current into an excitation current and a torque current;
- a calculating unit that calculates an excitation voltage and a torque voltage based on the rotation speed;
- a voltage converting unit that outputs a three-phase output voltage from the excitation voltage and the torque voltage;
- a modulating unit that outputs, based on the three-phase output voltage, a signal to control switching devices of the inverter circuit;
- an estimating unit that estimates an output torque of the motor from the excitation current and the torque current;
- a pulse transmitting unit that outputs the output torque as a positive-negative identifiable pulse stream signal;
- a pulse stream inputting unit that receives a pulse stream signal from outside;
- and
- a torque instruction converting unit that converts the pulse stream signal into a torque instruction.
Dependencies are inferred from the claim text.