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48 results about "Five phase induction motor" patented technology

System and method for controlling indirect torque of single regulating loop of three-phase induction motor

The invention discloses a system and method for controlling an indirect torque of a single regulating loop of a three-phase induction motor and relates to the technical field of motor drive and alternated current speed regulation. The system is provided with an indirect torque controller, a 32-bit digital signal processor used as the core of the system and a corresponding peripheral circuit. The software of the system comprises a flux linkage observation and torque calculation unit, a steady slip calculation unit, a revolving speed sampling period integral unit, a torque regulator unit, a stator flux linkage vector amplitude and phase calculation unit and a space voltage vector calculating and outputting unit. Through the method provided by the invention, the space voltage vector of controlling the motor in the next period can be acquired by utilizing the efficient value formula of each-phase electromotive force of a motor stator (UE is equal to 4.44kfNF), namely the ratio of the voltage vector amplitude to the phase gain is maintained as a constant when the motion track of a stator flux linkage vector is a flux linkage circle. In the invention, only the torque single proportional-integral (PI) regulating loop is required, thus the system structure is simplified, the dynamic property of the system is enhanced, and the high-performance control of the driving system of the three-phase induction motor is realized.
Owner:武汉菱电汽车电控系统股份有限公司

Instantaneous power detection and load identification based induction motor cooperative control system

ActiveCN103023420ARealize power-saving operationWith load following capabilityElectronic commutation motor controlAC motor controlDigital signal processingPower factor
The invention discloses an instantaneous power detection and load identification based induction motor cooperative control system which realizes energy-saving control on a light-loaded or unloaded three-phase induction motor and mainly comprises an instantaneous power detection and load identification cooperative controller using a digital signal processor TMS320F28346 as a core, a three-phase bridge power amplifier, a three-phase bridge driving circuit, the three-phase induction motor, a three-phase diode rectifier bridge, an instantaneous power detection link, a current detection link, a coder rotating speed detection link, a load identification link, a +24V switch power source, a +15V switch power source, a +/-12V switch power source, a +5V power source and the like. An instantaneous power detection and load identification based induction motor cooperative control method is adopted to control stator exciting current of the light-loaded or unloaded three-phase induction motor, and power factors of the three-phase induction motor are adjusted by load rate obtained on the basis of load identification, so that operating efficiency of the three-phase induction motor is effectively improved, and good electricity-saving effect is achieved.
Owner:BEIJING HONGHUI INT ENERGY TECH DEV CO LTD

Control system and control method for double-frequency stator double-winding five-phase induction generation system

The invention discloses a control method for a double-frequency stator double-winding five-phase induction generation system. The method comprises the following steps: collecting line voltage and phase current of a dual stator winding five-phase induction motor, first direct current voltage of a control winding side and second direct current voltage of a power winding side; respectively converting the line voltage and the phase current into a two-phase static coordinate system; calculating given current of a first frequency and the given current of a second frequency; calculating a phase signal of the first frequency, and converting the given current of the first frequency and the given current of the second frequency into a four-phase static coordinate system from a four-phase rotating coordinate system; and calculating given voltage in the static coordinate system and outputting a pulse width modulation voltage signal. According to the control method, control on optimal output of double-frequency signals and energy of the generation system under double frequencies can be achieved from the perspective of a control strategy on the basis of not changing generator hardware. The invention further discloses a control system for the double-frequency stator double-winding five-phase induction generation system.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

System and method for controlling indirect torque of single regulating loop of three-phase induction motor

The invention discloses a system and method for controlling an indirect torque of a single regulating loop of a three-phase induction motor and relates to the technical field of motor drive and alternated current speed regulation. The system is provided with an indirect torque controller, a 32-bit digital signal processor used as the core of the system and a corresponding peripheral circuit. The software of the system comprises a flux linkage observation and torque calculation unit, a steady slip calculation unit, a revolving speed sampling period integral unit, a torque regulator unit, a stator flux linkage vector amplitude and phase calculation unit and a space voltage vector calculating and outputting unit. Through the method provided by the invention, the space voltage vector of controlling the motor in the next period can be acquired by utilizing the efficient value formula of each-phase electromotive force of a motor stator (UE is equal to 4.44kfNF), namely the ratio of the voltage vector amplitude to the phase gain is maintained as a constant when the motion track of a stator flux linkage vector is a flux linkage circle. In the invention, only the torque single proportional-integral (PI) regulating loop is required, thus the system structure is simplified, the dynamic property of the system is enhanced, and the high-performance control of the driving system of the three-phase induction motor is realized.
Owner:武汉菱电汽车电控系统股份有限公司

Method for determining threshold value of multi-working-system three-phase induction motor protection system

The invention relates to a method for determining a threshold value of a multi-working-system three-phase induction motor protection system, belongs to the technical field of motor control, and solvesthe problem that an action value of an inherent protection control system of a motor does not allow the motor to operate in other load modes. The method comprises the following steps of calculating electromagnetic torque, and determining the overload capacity of the motor; establishing a dynamic mathematical model of the motor, and calculating the current of a winding; determining the loss in themotor; establishing a fluid-temperature temperature field three-dimensional coupling analysis model of the three-phase induction motor; driving the temperature rise values during different load operation according to the three-phase induction motor under the short-time working system, and determining the short-time working time limit when the motor drives the load to operate in an overload mode;and calculating the starting time and the running current during overload running of the motor, determining the threshold value of the protection action during short-time overload running of the motoraccording to the current value and the setting requirements of overload protection, over-current protection and short circuit protection of the motor, and determining the starting time value of the motor over-current protection required to be hidden. According to the method, the safety guarantee is provided for the operation of the motor in the multi-load mode.
Owner:HARBIN UNIV OF SCI & TECH

Instantaneous power detection and load identification based induction motor cooperative control system

ActiveCN103023420BRealize power-saving operationWith load following capabilityElectronic commutation motor controlAC motor controlDigital signal processingPower factor
The invention discloses an instantaneous power detection and load identification based induction motor cooperative control system which realizes energy-saving control on a light-loaded or unloaded three-phase induction motor and mainly comprises an instantaneous power detection and load identification cooperative controller using a digital signal processor TMS320F28346 as a core, a three-phase bridge power amplifier, a three-phase bridge driving circuit, the three-phase induction motor, a three-phase diode rectifier bridge, an instantaneous power detection link, a current detection link, a coder rotating speed detection link, a load identification link, a +24V switch power source, a +15V switch power source, a + / -12V switch power source, a +5V power source and the like. An instantaneous power detection and load identification based induction motor cooperative control method is adopted to control stator exciting current of the light-loaded or unloaded three-phase induction motor, and power factors of the three-phase induction motor are adjusted by load rate obtained on the basis of load identification, so that operating efficiency of the three-phase induction motor is effectively improved, and good electricity-saving effect is achieved.
Owner:BEIJING HONGHUI INT ENERGY TECH DEV CO LTD
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