TW201340553A - Motor device capable of switching output power - Google Patents

Abstract

A motor device capable of switching output power comprises a rotor unit, a stator unit, a plurality of coil units, and a change-over switch unit. The stator unit provides the relative rotation for the rotor unit and comprises a magnetic permeability module. The coil units are wound on the magnetic permeability module and comprise a plurality of coil modules. The total number of winding of the coil unit is averagely distributed to the coil modules. The change-over switch unit is electrically connected with and respectively switched and conducted the coil modules. By changing the distribution of number of winding for the coil modules and by switching the change-over switch unit, the electrical connection state of the coil modules can be switched among parallel connection, serial connection and floating connection so as to switch the output power of the motor. It achieve the efficacies of switching output power and saving energy through simple element design.

Description

Motor device capable of switching output power

The present invention relates to a motor device, and more particularly to a motor device that can switch output power.

Referring to FIG. 1, a conventional motor device is a three-phase AC motor, and the motor device includes a rotor unit 11, a certain subunit 12, and a motor drive circuit 13.

The rotor unit 11 rotates about its own axis. The stator unit 12 is disposed on the periphery of the rotor unit 11 and includes three stator coils 121. One end of each of the stator coils 121 is electrically connected to a node Z, and the other ends A, B, and C are electrically connected to the motor drive circuit. 13. The motor drive circuit 13 provides an AC power source to drive the rotation of the rotor unit 11.

Under normal circumstances, the motor device used in such as a car or an electric ship has a load greater than the load during operation, so in order to be able to start smoothly, the motor device is generally designed to have a higher output power. After the motor unit starts operating, the same output power is still supplied to continue the operation. This not only generates excess energy waste, but also does not meet the current trend of energy conservation.

In addition, a part of the motor device controls the output voltage of the AC power source or the output current frequency to adjust the output power of the motor device. However, the design structure of the motor driving circuit 13 is too complicated. higher cost.

Accordingly, it is an object of the present invention to provide a motor device that can switch output power and save energy with a simple component design.

Therefore, the motor device capable of switching output power of the present invention comprises a rotor unit, a certain subunit, a plurality of coil units, and a switch unit. The stator unit is relatively rotatable for the rotor unit and includes a magnetically conductive module. The coil units are wound around the magnetic conductive module and include a plurality of coil modules, and the total number of turns of the coil unit is evenly distributed to the coil modules. The switch unit is electrically connected and switches to turn on the coil modules.

The invention also provides another motor device capable of switching output power, comprising a rotor unit, a certain subunit, a plurality of coil units, and a switch unit. The stator unit is relatively rotatable for the rotor unit and includes a magnetically conductive module. The coil unit is wound around the magnetic module and includes a first coil module and a second coil module, and the number of winding turns of the first coil module is greater than the winding of the second coil module. number. The switch unit is electrically connected and switches between the first coil module and the second coil module.

The effect of the invention is that: by changing the winding number distribution of the coil modules, and switching the electrical connection state of the coil modules by the switching unit to switch between parallel, series and floating, ie Switch output power and save energy.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of FIG.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, a first preferred embodiment of the motor device 9 for switching output power according to the present invention comprises a rotor unit 2, a fixed subunit 3, a triple coil unit 4, and a changeover switch unit 5. The number of the coil units 4 may also be two, four or more, and the motor device 9 capable of switching the output power of the present invention may also include only one coil unit 4.

The stator unit 3 is disposed at the periphery of the rotor unit 2 and is relatively rotated by the rotor unit 2, and includes a magnetic conductive module 31. In this embodiment, the magnetic conductive module 31 is formed by laminating a plurality of silicon steel sheets, but may be other materials having the same characteristics.

The coil units 4 are respectively wound around the magnetic module 31. In the embodiment, each coil unit 4 includes two coil modules 41, but each coil unit 4 can also include any number of coil modules 41.

Each of the coil modules 41 has one end electrically connected to a node X, and the other end points A1, A2, B1, B2, C1, and C2 are electrically connected to the changeover switch unit 5, respectively.

The switch unit 5 switches the coil modules 41 to be turned on.

Taking one of the coil units 4 as an example, it is assumed that the motor device 9 has an output current P _conv of 1 horsepower (Horse Power, abbreviated as HP) when the input current is i and the number of winding turns is N. According to the right-hand rule of Ampere, the magnetic flux generated by the coil unit 4 wound around the stator unit 3 at this time is Φ. Since the magnetic flux Φ is proportional to the number of winding turns N and the input current i, the following relationship can be obtained:

And because the stator flux density B _S is proportional to the magnetic flux Φ:

The formula for the motor induced torque τ _ind and the stator flux density B _S is:

τ _ind = kB _R × B _S .......................................... ..........(Formula 3)

Where k is a constant determined according to the structure of the motor unit 9, and B _R is the rotor flux density. According to formula 3, it can be concluded that:

The motor output power P _conv is:

P _conv =τ _ind ω _m ........................................... ..........(Formula 5)

Where ω _m is the angular velocity at which the motor rotates. Equation 5 _shows that P _{conv is} proportional to τ _ind :

According to Equations 1, 2, 4 and 6, it can be derived that the motor output power P _{conv is} proportional to the number of winding turns N and the input current i:

Referring to FIG. 2 and FIG. 3, assuming that the total number of turns of the coil unit 4 is 2N, the number of winding turns of the coil modules 41 is 2N/2=N.

When the motor device 9 starts to start, a large output power is required to push the load. At this time, the switch module 5 can be controlled to connect the coil modules 41 in parallel and simultaneously turned on. Assuming that the total input current is i, the input currents of the coil modules 41 are respectively i/2. According to the formula 7, it can be deduced that the output powers P _conv corresponding to the coil modules 41 are each 1/2 HP. That is, the total output power is 1/2 HP+1/2 HP=1HP.

Referring to Figures 2 and 4, after the motor unit 9 starts operating, the load is reduced and a smaller output power can be used. At this time, the switch unit 5 can be controlled to turn on only one of the coil modules 41 and float the other coil module 41. The input coil module 41 has an input current of i/2. According to Equation 7, it can be deduced that the corresponding output power P _conv of the turned-on coil module 41 is 1/2 HP, that is, the total output power is reduced to 1/1. 2 HP. And because one of the coil modules 41 is floating, the total input current is reduced to half of the original, that is, i/2+0=i/2, and the energy consumption required at this time is also reduced to half of the original, so Reduce energy consumption.

Through the above description, the advantages of the present invention can be summarized as follows:

1. The output of the motor device 9 can be switched by assigning the number of turns of the coil modules 41 and switching the coil modules 41 to be connected in parallel, series or floating by the switch unit 5. power. It is convenient for users to adjust the power output according to the needs of use to achieve energy saving.

2. By assigning the number of turns of the coil modules 41 and using the simple switch unit 5, the motor drive circuit capable of controlling the output of the AC power source can be replaced to switch the output of the motor device 9. power.

Referring to FIG. 2 and FIG. 5, a second preferred embodiment of the present invention is similar to the first preferred embodiment, the second preferred embodiment and the first preferred embodiment. The difference between the embodiments is that, in the second preferred embodiment, each coil unit 4 includes a first coil module 42 and a second coil module 43, assuming that the total number of winding turns of the coil unit 4 is 2N, and the turns ratio of the first and second coil modules 42 and 43 is 2:1, that is, the number of turns of the first and second coil modules 42 and 43 are 4/3N and 2/, respectively. 3N.

When the motor device 9 starts to start, the switch unit 5 simultaneously turns on the first and second coil modules 42 and 43 and connects the first and second coil modules 42 and 43 in parallel, assuming that the total input current is i. The input currents of the first and second coil modules 42 and 43 are respectively i/2. According to the formula 7, the output powers P _conv corresponding to the first and second coil modules 42 and 43 are respectively 2/3. HP and 1/3 HP, that is, the total output power is 2/3 HP+1/3 HP=1HP.

After the motor device 9 starts to operate, the switch unit 5 can select only the first coil module 42 or the second coil module 43 to be turned on, assuming that the switch unit 5 only turns on the first coil module. And floating the second coil module 43, the input current of the first coil module 42 is i/2, and the number of turns of the first coil module 42 is 4/3N, according to formula 7, It can be derived that the corresponding output power P _conv is 2/3 HP, that is, the total output power is reduced to 2/3 HP. And because the second coil module 43 is floating, the total input current is reduced to i/2, and the energy consumption required at this time is also reduced to half of the original.

Assuming that the switch unit 5 only turns on the second coil module 43 and floats the first coil module 42, according to Equation 7, it can be deduced that the total output power is reduced to 1/3 HP. At this time, the total input current is reduced to half of the original, and the required energy consumption is reduced to half of the original.

Referring to FIG. 2 and FIG. 6 , a third preferred embodiment of the present invention is similar to the second preferred embodiment, the third preferred embodiment and the second preferred embodiment. The difference between the embodiments is that, in the third preferred embodiment, each coil unit 4 further includes a third coil module 44, assuming that the total number of turns of the coil unit 4 is 3N, and the first The turns ratio of the second and third coil modules 42 , 43 , 44 is 3:2:1, that is, the number of turns of the first, second and third coil modules 42 , 43 , 44 respectively It is 3/2N, N and 1/2N.

When the motor device 9 starts to be activated, the switch unit 5 simultaneously turns on the first, second, and third coil modules 42 , 43 , 44 , and the first, second, and third coil modules 42 , 43, 44 in parallel, assuming that the total input current is i, the input currents of the first, second and third coil modules 42, 43, 44 are respectively i/3, according to formula 7, the first, The output powers P _{conv of the} second and third coil modules 42 , 43 , 44 are 1/2 HP, 1/3 HP and 1/6 HP, respectively, that is, the total output power is 1/2 HP+1/3 HP+1/6 HP=1HP.

After the motor device 9 starts to operate, the switch unit 5 can select to turn on only the first, second or third coil modules 42, 43, 44, or only the two coil modules.

Assuming that the switching switch unit 5 only turns on the first, second or third coil modules 42, 43, 44 respectively, according to Equation 7, the corresponding output power P _conv can be derived as 1/2 HP, 1 respectively. /3 HP and 1/6 HP, and since only one coil module is turned on, the total input current is reduced to i/3, which means that the required energy consumption is reduced to one-third.

Assuming that the switch unit 5 turns on the first and second coil modules 42 and 43, the first and third coil modules 42 and 44, and the second and third coil modules 43 and 44, respectively, according to Equation 7, It can be deduced that the corresponding output power P _conv is 5/6 HP, 2/3 HP and 1/2 HP, respectively, and since only two coil modules are turned on, the total input current is reduced to 2i/3, that is, The required energy consumption is also reduced to two-thirds of the original.

It should be noted that the above description only discusses the state of parallel connection, but the switch unit 5 can also combine and connect the first, second and third coil modules 42, 43 and 44 respectively, and switch the conduction respectively. The first, second and third coil modules 42, 43, 44 are combined to obtain different output powers P _conv .

Referring to FIG. 7, in practical applications, the motor unit 9 can be combined with an encoder 7 for application to a servo motor system 8. Since the encoder 7 and the servo motor system 8 are familiar to the industry, they are not described herein.

In summary, by changing the winding parameter distribution of the coil modules 41, 42...44, and switching the power of the coil modules 41, 42...44 by the switching unit 5 The connection state can be switched between parallel, series and floating to switch the motor output power. It has the function of switching output power with simple component design and saving energy. Therefore, the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2. . . Rotor unit

3. . . Stator unit

31. . . Magnetic module

4. . . Coil unit

41. . . Coil module

42. . . First coil module

43. . . Second coil module

44. . . Third coil module

5. . . Switch unit

7. . . Encoder

8. . . Servo motor system

9. . . Motor unit

Figure 1 is a schematic view showing a conventional motor device;

Figure 2 is a schematic view showing a first preferred embodiment of the motor device for switching output power of the present invention;

Figure 3 is a schematic view showing one of the coil units of the first preferred embodiment;

Figure 4 is a schematic view showing the coil unit of the first preferred embodiment;

Figure 5 is a schematic view showing a second preferred embodiment of the motor device for switching output power of the present invention;

Figure 6 is a schematic view showing a third preferred embodiment of the motor device for switching output power of the present invention; and

Figure 7 is a block diagram showing the application of the motor device of the switchable output power of the present invention to a servo motor system.

2. . . Rotor unit

3. . . Stator unit

31. . . Magnetic module

4. . . Coil unit

41. . . Coil module

5. . . Switch unit

9. . . Motor unit

Claims (7)

A motor device capable of switching output power, comprising: a rotor unit; a certain subunit for relatively rotating the rotor unit and including a magnetic module; at least one coil unit wound around the magnetic module and including a plurality of coil modules The group of coil units has an average number of winding turns distributed to the coil modules; and a switch unit that electrically connects and switches the coil modules respectively. The motor device of the switchable output power according to claim 1, wherein the switch unit is controllable to switch the electrical connection states of the coil modules between parallel, series, and floating, respectively. Conversion. The motor device of the switchable output power according to any one of claims 1 to 2 is applied to a servo motor system. A motor device capable of switching output power, comprising: a rotor unit; a certain subunit for relatively rotating the rotor unit and including a magnetic module; at least one coil unit wound around the magnetic module and including a first a coil module and a second coil module, wherein the number of winding turns of the first coil module is greater than the number of winding turns of the second coil module; and a switching switch unit electrically connecting and respectively switching the turn-on a coil module and the second coil module. The motor device of the switchable output power according to claim 4, wherein the switch unit is controllable to switch the electrical connection states of the coil modules between parallel, series, and floating, respectively. Conversion. The motor device of the switchable output power according to claim 5, wherein the coil unit further comprises a third coil module having a number of winding turns smaller than or equal to the second coil module. The motor device of the switchable output power according to any one of claims 4 to 6 is applied to a servo motor system.