KR20090089055A - Apparatus and method for controlling space voltage vector in two-phase synchronous permanent magnet motor - Google Patents

Abstract

An apparatus and a method for controlling a space voltage vector in a two-phase synchronous permanent magnet motor are provided to improve voltage efficiency by applying the voltage only for the time relating to the operation of the motor. An angle sensor(160) senses an angle rotation of a rotor of a two phase permanent magnet synchronous motor. A current sensor(190) senses the current of the fixed coordinate system of each phase of the two phase permanent magnet motor. A second coordinate converter(180) converts the current of the fixed coordinate system into the current of the rotation coordinate system. A current loop controller(110) produces the current of the rotation coordinate system. A first coordinate converter(120) converts the voltage of the rotation coordinate system into the voltage of the fixed coordinate system. A vector controller(130) selects the space voltage vector used for controlling the two phase synchronous permanent magnet motor. An inverter controls the space voltage vector by controlling the on/off of the plurality of switching elements.

Description

Apparatus and method for controlling space voltage vector in two-phase synchronous permanent magnet motor}

The present invention relates to an apparatus and method for controlling a space voltage vector of an electric motor, and more particularly, by employing a full bridge inverter and applying a space voltage vector method to a two-phase permanent magnet synchronous motor. The present invention relates to an apparatus and method for controlling a space voltage vector of a two-phase permanent magnet synchronous motor capable of increasing voltage utilization efficiency without requiring a hardware configuration as in a two-phase synchronous motor control method.

Conventional control methods for controlling permanent magnet synchronous motors include hysteresis current control (CRPWM), triangular wave comparison (SPWM, Sinusoidal PWM), and space voltage vector.

CRPWM is a method of turning on / off the Insulated Gate Bipolar Transister (IGBT) by comparing the current flowing in the motor with the reference current, which can cause unnecessary switching several times in a short time, and the switching frequency is wide. There is a problem that noise occurs. Also, to implement this, analog circuits must be used.

The SPWM method generates a reference voltage by the difference between the reference current and the current flowing in the motor, and compares it with a triangle wave to turn on / off the IGBT. The voltage is always applied to the motor in the positive (+) direction or the negative (-) direction. Done.

The space voltage vector method is to apply the voltage as needed, and the voltage utilization is high and the digitization is possible to simplify the hardware configuration of the motor controller. However, the conventional three-phase space voltage vector control is a two-phase permanent magnet synchronous motor. There is a problem that can not be applied as it is.

The present invention was created in view of the above, and employs a full bridge inverter, while applying a space voltage vector method to a two-phase permanent magnet synchronous motor, thereby providing a hardware configuration as in the conventional CRPWM method or SPWM method. It is an object of the present invention to provide an apparatus and method for controlling a space voltage vector of a two-phase permanent magnet synchronous motor capable of increasing voltage utilization efficiency without necessity.

In order to achieve the above object, the space voltage vector control apparatus of a two-phase permanent magnet synchronous motor according to the present invention,

After converting the d, q-axis voltages (V _d , V _q ) of the synchronous speed coordinate system (rotational coordinate system) for the two-phase permanent magnet synchronous motor to the fixed coordinate system voltages (V _a , V _b ), the converted fixed coordinate system A space voltage vector control device for a two-phase permanent magnet synchronous motor that outputs a switching signal for controlling a two-phase permanent magnet synchronous motor based on voltages (V _a , V _b ),

An angle sensor installed in the two-phase permanent magnet synchronous motor and detecting a rotation angle of the rotor of the two-phase permanent magnet synchronous motor and providing the detected rotation angle information as a feedback input;

A current sensor for detecting _a fixed coordinate current (I _a , I _b ) of each phase of the two-phase permanent magnet motor and providing the detected current information to a feedback input;

Second coordinates for receiving the rotation angle information provided from the angle sensor and converting the fixed coordinate system currents I _a and I _b detected by the current sensor into the rotational coordinate system d and q-axis currents I _d and I _q . A conversion unit;

D, q-axis voltage (V) in the synchronous speed coordinate system (rotational coordinate system) by receiving the rotation angle information provided from the angle sensor and the rotational coordinate system current (I _d , I _q ) converted by the second coordinate conversion unit a current loop controller for calculating _d , V _q );

A first coordinate conversion unit which receives the rotation coordinate system voltage (V _d , V _q ) calculated by the current loop controller and the rotation angle information provided from the angle sensor and converts it into the fixed coordinate system voltage (V _a , V _b ) ;

The fixed coordinate system voltages (V _a , V _b ) converted by the first coordinate conversion unit are input, and a voltage vector application time is calculated therefrom, and a spatial voltage vector to be used for controlling the two-phase permanent magnet synchronous motor is obtained. Selecting a vector controller; And

And an inverter for controlling the space voltage vector by switching on / off a plurality of internal switching elements using the voltage vector application time calculated by the vector controller.

Here, the second coordinate conversion unit receives _a current (I _a , I _b ) detected in the rotation angle information and the fixed coordinate system to use a coordinate transformation matrix to convert the current (I _d , I _q ) of the rotation coordinate system Can be.

In this case, the coordinate transformation matrix for converting the rotational coordinate system current I _d and I _q may be expressed by the following mathematical relationship.

In addition, the first coordinate conversion unit receives the d, q-axis voltage (V _d , V _q ) calculated in the rotation angle information and the rotary coordinate system coordinates for converting to the fixed coordinate system voltage (V _a , V _b ) You can use a transformation matrix.

Here, the coordinate transformation matrix for converting the fixed coordinate system voltages (V _a , V _b ) can be expressed by the following mathematical relationship.

In addition, the inverter may have four unit circuits connected in parallel to each other, and each unit circuit may be a full bridge inverter including two IGBTs connected in series as a switching element.

In addition, in order to achieve the above object, the space voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention,

After converting the d, q-axis voltages (V _d , V _q ) of the synchronous speed coordinate system (rotational coordinate system) for the two-phase permanent magnet synchronous motor to the fixed coordinate system voltages (V _a , V _b ), the converted fixed coordinate system Space voltage vector of two-phase permanent magnet synchronous motor by space voltage vector control device of two-phase permanent magnet synchronous motor outputting switching signal for controlling two-phase permanent magnet synchronous motor based on voltage (V _a , V _b ) As a control method,

Detecting an angle of rotation of the rotor of the two-phase permanent magnet synchronous motor by an angle sensor, and providing the detected angle of rotation information as a feedback input;

Detecting currents (I _a , I _b ) in the fixed coordinate system of each phase of the two-phase permanent magnet synchronous motor by a current sensor, and providing the detected current information as a feedback input;

A second coordinate conversion unit receives the rotation angle information and the fixed coordinate current (I _a , I _b ) information, and the fixed coordinate current (I _a , I _b ) is rotated coordinate system d, q-axis current (I _d) , I _q );

Calculating the d, q-axis voltage (V _d , V _q ) in the synchronous speed coordinate system (rotational coordinate system) by receiving the rotation angle information and the rotational coordinate system current (I _d , I _q ) by a current loop controller; ;

Receiving the rotation coordinate system voltage (V _d , V _q ) and the rotation angle information by a first coordinate conversion unit and converting the rotation coordinate system voltage (V _a , V _b ) into the fixed coordinate system voltage (V _a , V _b );

Receiving _a fixed coordinate system voltage (V _a , V _b ) by a vector controller, calculating a voltage vector application time therefrom, and selecting a basic voltage vector to be used for controlling the two-phase permanent magnet synchronous motor; And

And controlling the basic voltage vector by on / off switching a plurality of switching elements inside the inverter by the inverter using the voltage vector application time.

Here, the transformation of the currents I _a and I _b detected in the fixed coordinate system into the rotational coordinate currents I _d and I _q may be performed using a coordinate transformation matrix.

The coordinate transformation matrix at this time can be expressed by the following mathematical relationship.

In addition, the conversion of the d, q-axis voltage (V _d , V _q ) calculated in the rotary coordinate system to the fixed coordinate system voltage (V _a , V _b ) may be performed using a coordinate transformation matrix.

The coordinate transformation matrix at this time can be expressed by the following mathematical relationship.

The voltage vector application time is a time for applying the basic voltage vectors V _{1 to} V ₄ as the space voltage vector to the motor, and T ₁ , which is a time for supplying the DC link voltage to the motor. It may include T ₂ and T ₀₁ , T ₀₂ , which is a time for not applying power to the motor as a time for applying the zero vector V ₀ to the motor. Here, the T ₁ , T ₂ , T ₀₁ , and T ₀₂ can be represented by the following mathematical relationship, respectively.

Here, T _s represents a sampling time and V _dc represents a DC link voltage, respectively.

According to the present invention as described above, by applying the space voltage vector method (digital method) to the two-phase permanent magnet synchronous motor, the same hardware as in the conventional CRPWM method or SPWM method (all analog methods) of the control method of the synchronous motor Since the voltage is applied only for the necessary time associated with the operation of the electric motor, the voltage utilization efficiency can be further increased.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the configuration of a space voltage vector control device of a two-phase permanent magnet synchronous motor according to an embodiment of the present invention, Figure 1 is a schematic view showing the overall configuration, Figure 2 is a A diagram showing the internal circuit configuration of the inverter.

1 and 2, the space voltage vector control apparatus 100 of the two-phase permanent magnet synchronous motor according to the present invention, the synchronous speed coordinate system (rotational coordinate system) for the two-phase permanent magnet synchronous motor 150 d, q-axis voltage (V _d, V _q) to the fixed coordinate system voltage (V _a, V _b) after conversion to, the converted fixed coordinate system voltage (V _a, V _b) 2-phase permanent magnet synchronous motor on the basis of A space voltage vector control device of a two-phase permanent magnet synchronous motor that outputs a switching signal for controlling 150, the current loop controller 110, the first coordinate conversion unit 120, the vector controller 130, and an inverter ( 140, an angle sensor 160, a second coordinate conversion unit 180, and a current sensor 190. In FIG. 1, reference numeral 170 denotes a DC link voltage.

The angle sensor 160 is installed in the two-phase permanent magnet synchronous motor 150, detects the rotation angle of the rotor 150r of the two-phase permanent magnet synchronous motor 150, the detected rotation angle information (θ) is provided as a feedback input.

The current sensor 190 is installed to measure the current flowing in the A-phase and B-phase coils of the two-phase permanent magnet synchronous motor 150, and provides the current of each phase as a feedback input.

The second coordinate conversion unit 180 receives the rotation angle information θ provided from the angle sensor 160 and rotates the fixed coordinate currents I _a and I _b detected by the current sensor 190. Convert to coordinate system d, q-axis current (I _d , I _q ).

The current loop controller 110 receives the rotation angle information θ provided from the angle sensor 160 and the rotation coordinate system currents I _d and I _q converted by the second coordinate conversion unit 180. The d, q-axis voltages V _d and V _{q in} the synchronous speed coordinate system (rotational coordinate system) are calculated. Here, as the current loop controller 110, a PID (Proportional Integral Derivative) controller may be used.

The first coordinate conversion unit 120 receives the rotation coordinate system voltages (V _d , V _q ) calculated by the current loop controller 110 and the rotation angle information (θ) provided from the angle sensor 160. Converted to the fixed coordinate system voltages (V _a , V _b ).

The vector controller 130 receives the fixed coordinate system voltages (V _a , V _b ) converted by the first coordinate transformation unit 120, calculates a voltage vector application time (described later) from the , The space voltage vectors V _{1 to} V ₄ and V ₀ to be used for controlling the two-phase permanent magnet synchronous motor 150. : These will be described later).

The inverter 140 controls the space voltage vector by switching on / off a plurality of switching elements inside the inverter by using the voltage vector application time calculated by the vector controller 130. As shown in FIG. 2, the inverter 140 includes four unit circuits connected in parallel to each other, and each unit circuit includes a full bridge including two IGBTs connected in series as switching elements 141. full bridge) inverters may be used.

In addition, the first coordinate conversion unit 120 receives the rotation angle information (θ) and the d, q-axis voltage (V _d , V _q ) calculated in the rotation coordinate system the fixed coordinate system voltage (V _a , You can use the coordinate transformation matrix to convert to V _b ).

In this case, the coordinate transformation matrix may be expressed by the following mathematical relationship.

In addition, the second coordinate conversion unit 180 receives the rotation angle information θ and the currents I _a and I _b detected in the fixed coordinate system and converts them into currents I _d and I _q of the rotation coordinate system. You can use the coordinate transformation matrix to do this.

In this case, the coordinate transformation matrix for converting the rotational coordinate system current I _d and I _q may be expressed by the following mathematical relationship.

Next, a method of controlling the space voltage vector of the two-phase permanent magnet synchronous motor by the space voltage vector control device of the two-phase permanent magnet synchronous motor according to the present invention having the above configuration will be described.

3 is a flowchart illustrating an execution process of a space voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention.

Referring to Figure 3, according to the method for controlling the space voltage vector of the two-phase permanent magnet synchronous motor according to the present invention, the rotor 150r of the two-phase permanent magnet synchronous motor 150 by the angle sensor 160 first Is detected, and the detected rotation angle information? Is provided as a feedback input (step S310). In addition, the current sensor 190 detects the coil currents I _a and I _b of each phase of the two-phase permanent magnet synchronous motor 150 in a fixed coordinate system, and provides the detected current information as a feedback input (step). S320).

Accordingly, the second coordinate conversion unit 180 receives the rotation angle information θ and the fixed coordinate system currents I _a and I _b , and converts the fixed coordinate currents I _a and I _b into the rotary coordinate system. It converts to current I _d , I _q (step S330). Here, the transformation of the fixed coordinate current I _a , I _b into the rotational coordinate system current I _d , I _q may be performed using a coordinate transformation matrix.

The coordinate transformation matrix can be expressed by the following mathematical relationship.

In this way, when the rotation coordinate system currents I _d and I _q are obtained, the current loop controller 110 receives the rotation coordinate system currents I _d and I _q and the rotation angle information θ to obtain a synchronous speed coordinate system ( The d, q-axis voltages V _d and V _q in the rotational coordinate system are calculated (step S340).

Here, the PID controller may be used as the current loop controller 110 as described above. The d-axis and q-axis voltages (V _d , V _q ) in the synchronous speed coordinate system (rotational coordinate system) may be used by the PID controller. This value is calculated regardless of the motor phase (three-phase, two-phase, etc.).

When the d, q-axis voltages (V _d , V _q ) in the synchronous speed coordinate system (rotational coordinate system) are calculated, the first coordinate transformation unit 120 performs the rotational coordinate system voltage (V _d , V _q ) and the rotation angle information. receiving a (θ) is converted to the fixed coordinate system voltage (V _a, V _b) (step S350).

Here, the conversion of the rotational coordinate system voltage (V _d , V _q ) to the fixed coordinate system voltage (V _a , V _b ) may be performed using a coordinate transformation matrix.

At this time, the coordinate transformation matrix can be expressed by the following mathematical relationship.

In this way, when the conversion to the fixed coordinate system voltage (V _a , V _b ) is completed, the vector controller 130 receives the fixed coordinate system voltage (V _a , V _b ), calculates the voltage vector application time therefrom, A space voltage vector to be used for controlling the two-phase permanent magnet synchronous motor 150 is selected (step S360).

Here, the voltage vector application time is a time for applying the basic voltage vectors V _{1 to} V ₄ as the space voltage vector to the motor, T ₁ , which is a time for supplying the DC link voltage 170 to the motor. It may include T ₂ and T ₀₁ , T ₀₂ , which is a time for not applying the DC link voltage 170 to the motor as a time for applying the zero vector V ₀ to the motor. Here, the T ₁ , T ₂ can be expressed by the following mathematical relationship.

Here, T _s represents a sampling time and V _dc represents a DC link voltage, respectively.

On the other hand, as shown in FIG. 2, when the coils of phase A and phase B, which are the stator windings of the two-phase permanent magnet synchronous motor, are electrically separated from each other, the vector controller 130 capable of driving the motor is shown in the table of FIG. There are four basic switching combinations. Since the A and B phases are separated from each other, the output of the V ₁ vector becomes an output that can be output from the A phase regardless of the current applied to the B phase. The output of the V ₂ vector is an output that can be output in the B phase regardless of the current application state of the A phase. In addition, like the output of the V ₁ vector, the output of the V ₃ vector becomes an output that can be output from the A phase regardless of the current applied state of the B phase. Similarly to the output of the V ₂ vector, the output of the V ₄ vector is also an output that can be output in the B phase regardless of the current application state of the A phase. 4 shows a space voltage vector of a two-phase permanent magnet synchronous motor, and includes four basic voltage vectors (V _{1 to} V ₄ ) and four sectors formed of these voltage vectors (that is, four in a quarter quadrant). / 4 quadrant). In this case, a case in which both the switching elements of the A and B phases are turned off is defined as a zero vector V ₀ , which is not shown in FIG. 4. For example, as shown in FIG. 6, when the reference voltage vectors determined as V _a and V _b are in a quarter quadrant, the reference voltage vector may be formed by a combination of the V ₁ voltage vector and the V ₂ voltage vector. Therefore, the sampling time (T _s) on the T ₁ applied to the V ₁ voltage over time, and applying the V ₂ voltage for T ₂ time, the remaining time is the principle of that the present invention makes a reference voltage by applying a zero vector of V ₀ to be.

The voltage V ₁ for a, T ₁ time, as shown in Equation 3, V ₂ T ₂ for sigan The voltage is applied to the two-phase permanent magnet synchronous motor 150, respectively, so that V _a and V _b Voltage can be generated, where T ₁ and T ₂ need only be less than the sampling time T _s , respectively. This condition is different from the condition of a three-phase synchronous motor in which the sum of T ₁ and T ₂ must be smaller than T _s , and the result is that the nonlinear control region in FIG. 4 becomes square rather than hexagonal in the three-phase synchronous motor. .

7 is a time the above-described V _a, V _b is in the fourth quadrant, illustrating the two-phase switching time of a PMSM.

Referring to FIG. 7, when T ₁ and T ₂ are calculated in Equation 3, the sampling time T _s is used by using T ₁ and T ₂ as shown in FIGS. 7A and 7C. Can be mapped in the interval, and T ₁ and T ₂ are divided by 1/2, so that sampling time T _s as shown in (b) and (d) of FIG. It can also be mapped within the interval. At this time, when the A and B phases use the same DC link voltage 170, the sampling time T by dividing T ₁ and T ₂ by 1/2 or more, as shown in (b) and (d) of FIG. _s Mapping within an interval can increase efficiency in terms of power supply. Here, the times T ₀₁ and T ₀₂ , which do not supply the DC link voltage 170 to the motor, are the times at which the zero vector V ₀ is applied, and can be expressed as follows.

On the other hand, under the conditions of T ₁ , T ₂ , if T ₁ > T _s or T ₂ > T _s , the method maintains the direction of the voltage vector and reduces its magnitude. The constant α is calculated by applying the new T ₁ and T ₂ to the space voltage vector control as follows.

1) T ₁ > T _s , T ₁ > T ₂

T _s = αT ₁ , T ₁ = T _s , T ₂ = αT ₂

2) T ₂ > T _s , T ₂ > T ₁

T _s = αT ₂ , T ₂ = T _s , T ₁ = αT ₁

When the calculation of the voltage vector application time (T ₁ , T ₂ , T ₀₁ , T ₀₂ ) and the selection of the basic voltage vectors V _{1 to} V ₄ and V ₀ are completed, the inverter 140 generates the voltage. The basic voltage vectors V _{1 to} V ₄ and V ₀ by switching on / off a plurality of switching elements 141 inside the inverter using a vector application time T ₁ , T ₂ , T ₀₁ , T ₀₂ . That is, the space voltage vector is controlled (step S370).

As mentioned above, although the present invention has been described in detail with reference to the preferred embodiment, the present invention is not limited thereto, and it will be apparent to those skilled in the art that various changes and applications can be made without departing from the technical spirit of the present invention. Therefore, the true protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be construed as being included in the scope of the present invention.

1 is a schematic configuration diagram of an apparatus for controlling a space voltage vector of a two-phase permanent magnet synchronous motor according to the present invention.

2 is an internal circuit diagram of an inverter of a space voltage vector control device of a two-phase permanent magnet synchronous motor of FIG.

3 is a flow chart showing an execution process of the space voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention.

4 is a view showing a basic voltage vector to be controlled in the space voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention;

FIG. 5 is a diagram illustrating a combination relationship between ON and OFF of the basic voltage vector and the switching device of FIG. 4; FIG.

6 is a view showing a relationship between the fixed coordinate system voltage (V _a , V _b ) and the basic voltage vectors (V ₁ ~ V ₄ ) employed in the space voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention.

7 is an example of mapping T ₁ and T ₂ calculated from the fixed coordinate system voltages (V _a , V _b ) employed in the spatial voltage vector control method of a two-phase permanent magnet synchronous motor according to the present invention to a sampling time T _s . Drawing showing.

<Explanation of symbols for the main parts of the drawings>

110: current loop controller 120: first coordinate conversion unit

130: vector controller 140: inverter

150: two-phase permanent magnet synchronous motor 150r: rotor

160: angle sensor 170: DC link voltage

180: second coordinate conversion unit 190: current sensor

Claims (7)

After converting the d, q-axis voltages (V _d , V _q ) of the synchronous speed coordinate system (rotational coordinate system) for the two-phase permanent magnet synchronous motor to the fixed coordinate system voltages (V _a , V _b ), the converted fixed coordinate system A space voltage vector control device for a two-phase permanent magnet synchronous motor that outputs a switching signal for controlling a two-phase permanent magnet synchronous motor based on voltages (V _a , V _b ), An angle sensor installed in the two-phase permanent magnet synchronous motor and detecting a rotation angle of the rotor of the two-phase permanent magnet synchronous motor and providing the detected rotation angle information as a feedback input; A current sensor for detecting _a fixed coordinate current (I _a , I _b ) of each phase of the two-phase permanent magnet motor and providing the detected current information to a feedback input; Second coordinates for receiving the rotation angle information provided from the angle sensor and converting the fixed coordinate system currents I _a and I _b detected by the current sensor into the rotational coordinate system d and q-axis currents I _d and I _q . A conversion unit; D, q-axis voltage (V) in the synchronous speed coordinate system (rotational coordinate system) by receiving the rotation angle information provided from the angle sensor and the rotational coordinate system current (I _d , I _q ) converted by the second coordinate conversion unit a current loop controller for calculating _d , V _q ); First coordinate transformation to receive the rotation coordinate system voltage (V _d , V _q ) calculated by the current loop controller and the rotation angle information provided from the angle sensor to convert to the fixed coordinate system voltage (V _a , V _b ) part; The fixed coordinate system voltages (V _a , V _b ) converted by the first coordinate conversion unit are input, and a voltage vector application time is calculated therefrom, and a spatial voltage vector to be used for controlling the two-phase permanent magnet synchronous motor is obtained. Selecting a vector controller; And A space voltage of a two-phase permanent magnet synchronous motor, comprising: an inverter controlling the space voltage vector by switching on / off a plurality of internal switching elements using the voltage vector application time calculated by the vector controller. Vector control unit. The method of claim 1, The second coordinate converter uses the coordinate transformation matrix as follows to receive the rotation angle information and the currents I _a and I _b detected in the fixed coordinate system and convert them into the rotation coordinate currents I _d and I _q . Space voltage vector control device of a two-phase permanent magnet synchronous motor.

The method of claim 1, The first coordinate conversion unit receives the d, q-axis voltage (V _d , V _q ) calculated in the rotation angle information and the rotation coordinate system to convert the fixed coordinate system voltage (V _a , V _b ) as follows Space voltage vector control device of a two-phase permanent magnet synchronous motor, characterized in that using the coordinate transformation matrix.

The method according to any one of claims 1 to 3, The inverter has four unit circuits connected in parallel to each other, each unit circuit is a full-voltage inverter of the two-phase permanent magnet synchronous motor, characterized in that the full bridge inverter consisting of a circuit connected in series with two IGBTs as switching elements . After converting the d, q-axis voltages (V _d , V _q ) of the synchronous speed coordinate system (rotational coordinate system) for the two-phase permanent magnet synchronous motor to the fixed coordinate system voltages (V _a , V _b ), the converted fixed coordinate system Space voltage vector of two-phase permanent magnet synchronous motor by space voltage vector control device of two-phase permanent magnet synchronous motor outputting switching signal for controlling two-phase permanent magnet synchronous motor based on voltage (V _a , V _b ) As a control method, Detecting an angle of rotation of the rotor of the two-phase permanent magnet synchronous motor by an angle sensor, and providing the detected angle of rotation information as a feedback input; Detecting currents (I _a , I _b ) in the fixed coordinate system of each phase of the two-phase permanent magnet synchronous motor by a current sensor, and providing the detected current information as a feedback input; A second coordinate conversion unit receives the rotation angle information and the fixed coordinate current (I _a , I _b ) information, and the fixed coordinate current (I _a , I _b ) is rotated coordinate system d, q-axis current (I _d) , I _q ); Calculating the d, q-axis voltage (V _d , V _q ) in the synchronous speed coordinate system (rotational coordinate system) by receiving the rotation angle information and the rotational coordinate system current (I _d , I _q ) by a current loop controller; ; Receiving the rotation coordinate system voltage (V _d , V _q ) and the rotation angle information by a first coordinate conversion unit and converting the rotation coordinate system voltage (V _a , V _b ) into the fixed coordinate system voltage (V _a , V _b ); Receiving _a fixed coordinate system voltage (V _a , V _b ) by a vector controller, calculating a voltage vector application time therefrom, and selecting a basic voltage vector to be used for controlling the two-phase permanent magnet synchronous motor; And And controlling the basic voltage vector by on / off switching a plurality of switching elements inside the inverter by using the voltage vector application time by an inverter to control the space voltage vector of the two-phase permanent magnet synchronous motor. Way. The method of claim 5, The voltage vector application time is time for supplying a DC link voltage to the motor as a time for applying a fundamental voltage vector (V ₁ ~V ₄₎ as the spatial voltage vector in the motor T _1, T _2, and a zero vector (V ₀₎ to the space voltage of the two-phase permanent magnet synchronous motor as a time that comprises a DC link voltage times the T _01, T ₀₂ is not supplied to the electric motor is vector to the motor Control method. The method of claim 6, T ₁ , T ₂ , T ₀₁ , and T ₀₂ are represented by the following mathematical relationship, respectively. The space voltage vector control method of a two-phase permanent magnet synchronous motor.

Where T _s is the sampling time and V _dc is the DC link voltage, respectively.

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