New sensorless vector control methods based on a new minimum-order flux state observer in the ?D-module? for permanent magnet synchronous motors

Abstract

SUMMARYThis paper proposes new sensorless vector control methods that can be applied to both salient-pole and nonsalient-pole permanent magnet synchronous motors (PMSM). The proposed method estimates the phase of rotor flux by the "D-module observer," which is newly developed for sensorless vector controls of PMSM. The "D-module observer" has the following attractive features. (1) It is a new state observer requiring no additional approximation to the motor mathematical model. (2) It is a minimum-order state observer. (3) Observer gain guaranteeing proper estimation in a wide operating range except for singular zerospeed can be a simple constant, and can be easily designed.

Estimation of rotor position error from active and reactive power in permanent magnet synchronous motor

“…The equation to compute Δθ is chosen from (18) or (20) according as the operation speed. The estimated rotor position and angular velocity were obtained using a PLL control [6], which is controlled so that Δθ can vanish. In the sensorless control, θ and ω are used the coordinate transformation and speed control, respectively.…”

Development of a new sensorless vector‐controlled and transmissionless electric vehicle using a permanent‐magnet synchronous motor

“…2 is basically not employed. The estimated values are determined by using a D-state observer with the following features [16].…”

“…Using a single gain, stability can be guaranteed in a wide operating range including acceleration/deceleration. The D-state observer can be expressed as follows [16], with ω 2n denoting the estimated electrical angular speed of the rotor. [16] Here The configuration of the D-state observer based on Eqs.…”

Potentiality of a new minimum‐order back‐EMF state observer taking acceleration into account for sensorless vector control of permanent‐magnet synchronous motors

“…21, if the method of representing a state observer for a PMSM suggested by Shinnaka is followed, then the following minimum-order (second order) can be created for the state equation (narrowly defined) and the output equation where the state variable is the back EMF e (see Note 3 in the Appendix). 21, if the method of representing a state observer for a PMSM suggested by Shinnaka is followed, then the following minimum-order (second order) can be created for the state equation (narrowly defined) and the output equation where the state variable is the back EMF e (see Note 3 in the Appendix).…”

“…As a result, from the standpoint of estimation which includes phase information, the primary phase estimation methods can be broadly divided into a method to estimate the rotor flux [21] and a method to estimate the induced current or the expanded induced current (definitions vary) [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. As a result, from the standpoint of estimation which includes phase information, the primary phase estimation methods can be broadly divided into a method to estimate the rotor flux [21] and a method to estimate the induced current or the expanded induced current (definitions vary) [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”