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Motor control device

A control device and motor technology, which is applied in motor generator control, electronic commutation motor control, control of electromechanical transmission devices, etc., can solve problems such as difficulty in adjustment, difficulty in achieving optimal motor drive, and difficulty in parameter optimization.

Inactive Publication Date: 2009-06-03
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Third, the γ-axis current command value i that requires complicated calculations to be performed successively γ *Calculation of
[0022] Parameter adjustment for rotor position estimation and γ-axis current command value i γ *The parameters used for calculation are adjusted separately, and corresponding adjustment time is required
In addition, the error in parameter adjustment for rotor position estimation and the γ-axis current command value i γ * Errors in parameter tuning for calculations affect each other, making tuning more difficult
In addition, the optimization of the parameters due to the difficulty of adjustment is difficult to achieve, as a result, it is difficult to achieve the optimal drive of the motor
[0023] In addition, in the technologies described in the above-mentioned Patent Documents 1 and 2 and the above-mentioned Non-Patent Document 1, the above-mentioned problems cannot be solved.
In addition, in Patent Document 2, the calculation of Δθ≈0 is used, so the larger Δθ is, the lower the estimation accuracy is.

Method used

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Experimental program
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no. 1 Embodiment approach 》

[0106] Embodiments of the present invention will be described in detail below. First, a first embodiment of the present invention will be described. figure 1 It is a block configuration diagram of the motor drive system related to the first embodiment. 1 is a three-phase permanent magnet synchronous motor 1 (hereinafter simply referred to as "motor 1") in which a permanent magnet is used as a rotor (not shown) and an armature coil is used as a stator (not shown). The motor 1 is a salient pole motor (a motor having a salient pole) represented by an embedded magnet synchronous motor.

[0107] Reference numeral 2 denotes a PWM (Pulse Width modulation) inverter, which supplies a three-phase AC voltage composed of U-phase, V-phase, and W-phase to the motor 1 corresponding to the rotor position of the motor 1 . Let the voltage supplied to the motor 1 be a motor voltage (armature voltage) Va, and the current supplied to the motor 1 from the inverter 2 be a motor current (armature ...

no. 2 Embodiment approach

[0197] Next, a second embodiment of the present invention will be described. In the descriptions of the above-mentioned first embodiment, this embodiment, and other embodiments described later, unless otherwise specified, those denoted by the same symbols are the same, and those denoted by the same symbols (θ, ω, etc.) are the same. . Therefore, repeated explanations about those to which the same symbols or signs are attached may be omitted.

[0198] Figure 10 It is a block configuration diagram of the motor drive system related to the second embodiment. The related motor drive system of the second embodiment includes a motor 1, an inverter 2, and a motor control device 3a.

[0199]The motor control device 3 a estimates the rotor position of the motor 1 using the motor current Ia, and outputs a signal for rotating the motor 1 at a desired rotational speed to the PWM inverter 2 . The desired rotation speed is supplied to the motor control device 3a as a motor speed command...

no. 3 Embodiment approach

[0333] In addition, the configuration of the motor control device 3a shown in FIG. 14 may be modified as shown in the motor control device 3b of FIG. 19 . An embodiment in which this modification is implemented is referred to as a third embodiment of the present invention. In the motor control device 3b, the estimator 40 of the motor control device 3a shown in FIG. Except for this substitution, the motor control device 3 a and the motor drive system in FIG. 14 are the same as the motor control device 3 b and the motor drive system in FIG. 19 . Therefore, the description of the configuration and operation of the same parts is omitted.

[0334] The estimator 45 uses i γ i δ , v γ * and v δ *, Estimate the phase of the d-axis seen from the U phase, and use this estimated value as θ dqe . In addition, the estimator 45 calculates the estimated motor speed ω similarly to the estimator 40 in the second embodiment. e . In addition, through the θ dqe When the estimated motor ...

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Abstract

A motor control device includes an estimator for estimating a rotor position of a motor having a salient pole by using a value corresponding to a q-axis inductance of the motor as an operation parameter where an estimated axes for the control corresponding to d-q axes are gamma-delta axes, and a controller for controlling the motor based on the estimated rotor position. The estimator generates a deviation between a d-axis and a q-axis by performing the estimation of the rotor position based on a value between a real q-axis inductance and a real d-axis inductance of the motor adopted as the operation parameter. The controller controls the motor so that a delta-axis component of a motor current supplied to the motor is maintained to be a predetermined value of zero or close to zero regardless of a value of a gamma-axis component of the motor current.

Description

technical field [0001] The present invention relates to a motor control device for controlling the operation of a motor. It also relates to a motor drive system with the motor control device. Background technique [0002] Conventionally, a motor control device (sensorless control device) has been developed that estimates the rotor position of a motor without using a rotor position sensor, and controls the motor based on the estimated rotor position. An example of a block diagram of such a motor control device 103 is shown in FIG. 21 . In the configuration shown in FIG. 21 , in the vector control of the motor, the estimation axis for the control corresponding to the d-axis is referred to as the γ-axis, and the estimation axis for the control corresponding to the q-axis is referred to as the δ-axis. Figure 23 The relationship among the d-axis, q-axis, γ-axis, and δ-axis is shown in . Figure 23 E in ex , is generally a voltage vector called the extended induced voltage (ext...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18H02P21/00
CPCY02T10/643
Inventor 富樫仁夫比田一
Owner SANYO ELECTRIC CO LTD