CN104113262A - Variable frequency air-conditioner and motor control system based on Z-source converter - Google Patents
Variable frequency air-conditioner and motor control system based on Z-source converter Download PDFInfo
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Abstract
The invention belongs to the technical field of variable frequency air-conditioners, and provides a variable frequency air-conditioner and a motor control system based on a Z-source converter. The motor control system based on the Z-source converter is that surge generated by the variable frequency air-conditioner in starting is inhibited by a soft start circuit so that power supply switch trip-out and device over-current damage caused by instant over-current of a rectification circuit and the Z-source converter can be prevented. Voltage-boosting capacity is ensured to be enhanced via circuit topology formed by the Z-source converter, a switch tube and a filter circuit when conduction duty ratio of the switch tube is less than 0.5. Meanwhile, a motor is driven to operate via an inverter, and wide-range voltage regulation control and power factor correction control of the Z-source converter are realized via controlling the inverter by a control unit so that a pass-through phenomenon of upper and lower bridge arm switch tubes of the inverter is permitted, working safety of the inverter is enhanced, harmonic influence of dead zone time arrangement on output current of the inverter is eliminated, motor torque ripple is reduced and motor noise is lowered.
Description
Technical field
The invention belongs to convertible frequency air-conditioner technical field, relate in particular to a kind of convertible frequency air-conditioner and the electric machine control system based on Z source converter thereof.
Background technology
In traditional convertible frequency air-conditioner, the PFC(Power Factor Correction using, power factor correction) circuit is to adopt BOOST circuit topological structure to realize, when realizing PFC, there is conduction loss and switching loss in the switching tube in BOOST circuit, and then reduced conversion efficiency, also there is the possibility that overcurrent and excess temperature damage in the switching tube in BOOST circuit simultaneously, thereby cause the functional reliability of convertible frequency air-conditioner poor; Moreover, the motor of compressor or the motor of DC fan by inverter control are the critical pieces of convertible frequency air-conditioner, and inverter can cause because controlling the reasons such as error or electromagnetic interference the switching tube of its inner upper and lower bridge arm to occur straight-through being damaged, and then cause frequency-conversion air-conditioning system to be damaged.
Straight-through for avoiding the switching tube of inverter inside to occur, prior art adopts the mode that Dead Time is set to control the not conducting at one time of upper and lower bridge arm switching device.But, upper and lower bridge arm switching device in inverter is arranged to Dead Time and can affect the quality of output current wave again, thereby the output current harmonics distortion that causes inverter worsens, the torque ripple of motor is large and noise is large, and further affects job stability and the reliability of convertible frequency air-conditioner.
Summary of the invention
The object of the present invention is to provide a kind of electric machine control system based on Z source converter, be intended to solve the problem that the existing torque ripple that causes inverter to occur output current harmonics distortion, motor of prior art is large and noise is large.
The present invention is achieved in that a kind of electric machine control system based on Z source converter, is connected with motor, comprises control unit, and described control unit is connected with the indoor set of convertible frequency air-conditioner;
Described electric machine control system also comprises:
Soft starting circuit, rectification circuit, Z source converter, switching tube, filter circuit and inverter;
The input of described soft starting circuit is connected respectively the live wire end of electrical network and the positive input terminal of described rectification circuit with output, the first control end of described soft starting circuit is connected described control unit with the second control end, the negative input end of described rectification circuit connects the zero line side of described electrical network, the positive output end of described rectification circuit connects the positive input terminal of described Z source converter, the negative output terminal of described rectification circuit is connected with the negative input end of described Z source converter, the positive output end of described Z source converter connects the input of described switching tube and the input of described filter circuit simultaneously, the positive output end of described filter circuit connects the positive input terminal of described inverter, the negative output terminal of described Z source converter connects the output of described switching tube simultaneously, the negative output terminal of described filter circuit and the negative input end of described inverter, a plurality of control ends of the control end of described switching tube and described inverter are all connected with described control unit, the U phase output terminal of described inverter, V phase output terminal and W phase output terminal connect described motor, described inverter includes brachium pontis switching tube and lower brachium pontis switching tube.
Another object of the present invention is also to provide a kind of convertible frequency air-conditioner, and described convertible frequency air-conditioner comprises indoor set, motor and the above-mentioned electric machine control system based on Z source converter.
The present invention comprises soft starting circuit by employing, rectification circuit, Z source converter, switching tube, the electric machine control system based on Z source converter of filter circuit and inverter, surge convertible frequency air-conditioner being produced when starting by soft starting circuit suppress to prevent rectification circuit and Z source converter because of moment overcurrent cause power switch tripping operation and device overcurrent to damage, guaranteed the job security of system, by Z source converter, the circuit topology that switching tube and filter circuit form guarantees that the conducting duty ratio of switching tube is less than at 0.5 o'clock and can improves boost capability, and the deadline of switching tube is long, be conducive to heat radiation, by inverter AC motor, turn round simultaneously, and by control unit control inverter, Z source converter is realized to wide region Regulation Control and Power Factor Correction Control, thereby there is straight-through phenomenon in the upper and lower bridge arm switching tube that allows inverter, improved the job security of inverter, eliminated the impact on the output current harmonics of inverter that arranges of Dead Time, and the torque ripple and the noise that has reduced motor of motor have been reduced.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the electric machine control system based on Z source converter that provides of the embodiment of the present invention;
Fig. 2 is the exemplary circuit structure chart of the frequency-conversion air-conditioning system based on Z source converter that provides of one embodiment of the invention;
Fig. 3 is the exemplary circuit structure chart of the frequency-conversion air-conditioning system based on Z source converter that provides of another embodiment of the present invention;
Fig. 4 is the circuit structure diagram of the derivative circuit of the related Z source converter of the electric machine control system based on Z source converter that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With the routine electric machine control system based on Z source converter that the embodiment of the present invention is provided that is applied as in convertible frequency air-conditioner, be elaborated below:
Convertible frequency air-conditioner comprises indoor set, motor and the electric machine control system based on Z source converter, and wherein, motor can be compressor electric motor or the DC fan motor in off-premises station.
Fig. 1 shows the modular structure of the electric machine control system based on Z source converter that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
The electric machine control system based on Z source converter 100 that the embodiment of the present invention provides is connected with motor 200, electric machine control system 100 comprises control unit 107, control unit 107 is connected with the indoor set of convertible frequency air-conditioner, and its inside comprises indoor master controller, outdoor governor circuit and outdoor drive circuit.
Electric machine control system 100 also comprises soft starting circuit 101, rectification circuit 102, Z source converter 103, switching tube 104, filter circuit 105 and inverter 106.
The input of soft starting circuit 101 is connected respectively the live wire end L of electrical network and the positive input terminal of rectification circuit 102 with output, the first control end of soft starting circuit 101 and the second control end connection control unit 107, the negative input end of rectification circuit 102 connects the zero line side N of electrical network, the positive output end of rectification circuit 102 connects the positive input terminal of Z source converter 103, the negative output terminal of rectification circuit 102 is connected with the negative input end of Z source converter 103, the input of the positive output end while connecting valve pipe 104 of Z source converter 103 and the input of filter circuit 105, the positive output end of filter circuit 105 connects the positive input terminal of inverter 106, the negative output terminal of Z source converter 103 is the output of connecting valve pipe 104 simultaneously, the negative input end of the negative output terminal of filter circuit 105 and inverter 106, a plurality of control ends of the control end of switching tube 104 and inverter 106 are all connected with control unit 107, the U phase output terminal of inverter 106, V phase output terminal and W phase output terminal connect motor 200, inverter 106 includes brachium pontis switching tube and lower brachium pontis switching tube.
Fig. 2 shows the exemplary circuit structure of the electric machine control system based on Z source converter that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
As one embodiment of the invention, soft starting circuit 101 comprises relay R L and positive temperature coefficient resistor PTC, first of relay R L controls contact 1 and second and controls the first control end and the second control end that contact 2 is respectively soft starting circuit 101, the switch contact 3 of relay R L and the input of the common contact of the first end of positive temperature coefficient resistor PTC as soft starting circuit 101, the normally opened contact 4 of relay R L and the output of the common contact of the second end of positive temperature coefficient resistor PTC as soft starting circuit 101.
As one embodiment of the invention, rectification circuit 102 comprises rectifier bridge BD and the first electrochemical capacitor C, the positive input terminal 1 of rectifier bridge BD and negative input end 2 are respectively positive input terminal and the negative input end of rectification circuit 102, the anodal common contact of the output 3 of rectifier bridge BD and the first electrochemical capacitor C is as the positive output end of rectification circuit 102, and the common contact of the earth terminal 4 of rectifier bridge BD and the negative pole of the first electrochemical capacitor C is as the negative output terminal of rectification circuit 102.
As one embodiment of the invention, Z source converter 103 comprises:
Diode D1, the first inductance L 1, the first storage capacitor C1, the second storage capacitor C2 and the second inductance L 2;
The anode of diode D1 is the positive input terminal of Z source converter 103, the positive pole of the negative electrode of diode D1 and the first storage capacitor C1 is connected to the first end of the first inductance L 1 altogether, the anodal common contact of the second end of the first inductance L 1 and the second storage capacitor C4 is as the positive output end of Z source converter 103, the common contact of the first end of the negative pole of the second storage capacitor C2 and the second inductance L 2 is as the negative input end of Z source converter 103, and the common contact of the second end of the negative pole of the first storage capacitor C1 and the second inductance L 2 is as the negative output terminal of Z source converter 103.
As one embodiment of the invention, switching tube 104 can be IGBT(Isolated Gate Bipolar Transistor, insulated gate bipolar thyristor), metal-oxide-semiconductor or other possess the all-controlled semiconductor device of switching characteristic.In embodiments of the present invention, switching tube 104 is preferably IGBT, and as shown in Figure 2, the grid of IGBT, collector and emitter are respectively control end, input and the output of switching tube 104; When switching tube 104 possesses the all-controlled semiconductor device of switching characteristic for other, take and realize switching characteristic and determine each end utmost point of selected all-controlled semiconductor device and the corresponding relation between control end, input and the output of switching tube 104 as object.
As one embodiment of the invention, filter circuit 105 comprises the 3rd inductance L 3 and the second electrochemical capacitor C3, the first end of the 3rd inductance L 3 is the input of filter circuit 105, the anodal common contact of the second end of the 3rd inductance L 3 and the second electrochemical capacitor C3 is as the positive output end of filter circuit 105, and the negative pole of the second electrochemical capacitor C3 is the negative output terminal of filter circuit 105.
As one embodiment of the invention, inverter 106 comprises:
The first switching tube 1061, second switch pipe 1062, the 3rd switching tube 1063, the 4th switching tube 1064, the 5th switching tube 1065 and the 6th switching tube 1066;
The common contact of the input of the input of the input of the first switching tube 1061 and second switch pipe 1062 and the 3rd switching tube 1063 is as the positive input terminal of inverter 106, the common contact of the input of the output of the first switching tube 1061 and the 4th switching tube 1064 is as the U phase output terminal of inverter 106, the common contact of the input of the output of second switch pipe 1062 and the 5th switching tube 1065 is as the V phase output terminal of inverter 106, the common contact of the input of the output of the 3rd switching tube 1063 and the 6th switching tube 1066 is as the W phase output terminal of inverter 106, the common contact of the output of the output of the output of the 4th switching tube 1064 and the 5th switching tube 1065 and the 6th switching tube 1066 is as the negative input end of inverter 106, the control end of the first switching tube 1061, the control end of second switch pipe 1062, the control end of the 3rd switching tube 1063, the control end of the 4th switching tube 1064, the control end of the control end of the 5th switching tube 1075 and the 6th switching tube 1066 is respectively the first control end of inverter 106, the second control end, the 3rd control end, the 4th control end, the 5th control end and the 6th control end, and be connected with control unit 107.
Wherein, the first switching tube 1061, second switch pipe 1062 and the 3rd switching tube 1063 are the upper brachium pontis switching tube of inverter 106, and the 4th switching tube 1064, the 5th switching tube 1065 and the 6th switching tube 1066 are the lower brachium pontis switching tube of inverter 106; The first switching tube 1061, second switch pipe 1062, the 3rd switching tube 1063, the 4th switching tube 1064, the 5th switching tube 1065 and the 6th switching tube 1066 can adopt triode, metal-oxide-semiconductor, IGBT or other to possess the semiconductor device of switching characteristic simultaneously, and can be preferably in embodiments of the present invention IGBT(as shown in Figure 2), the grid of IGBT, collector and emitter are respectively control end, input and the output of switching tube.
In another embodiment of the present invention, as shown in Figure 3, inverter 106 can also be Intelligent Power Module (IPM, Intelligent Power Module), the high voltage end P of Intelligent Power Module and earth terminal N are respectively as positive input terminal and the negative input end of inverter 106, the mutually electric output U1 of U of Intelligent Power Module, the mutually electric output V1 of V and the mutually electric output W1 of W are respectively U phase output terminal, V phase output terminal and the W phase output terminal of inverter 106, and the upper brachium pontis switching tube in Intelligent Power Module is all connected with control unit 200 with lower brachium pontis switching tube.
Below in conjunction with operation principle, the above-mentioned electric machine control system 100 based on Z source converter is described further:
When convertible frequency air-conditioner does not start, electric machine control system 100 does not start yet, and now, the normally opened contact 4 of the relay R L in soft starting circuit 101 is not closed; When convertible frequency air-conditioner starts, electric machine control system 100 also starts thereupon, first civil power passes through the surge producing when positive temperature coefficient resistor PTC and rectifier bridge BD charge to suppress to start to the first inductance L 1, the first storage capacitor C1, the second storage capacitor C2 and the second inductance L 2 in the first storage capacitor C and Z source converter 103, then by normally opened contact 4 closures of control unit 107 control relay RL after postponing Preset Time, so that positive temperature coefficient resistor PTC is realized to short circuit, convertible frequency air-conditioner enters normal operating conditions, and motor 200 runs well.Hence one can see that, by above-mentioned, Z source converter 103 is realized to soft start, can reduce the transient state overcurrent of rectification circuit 102, prevent device failure, avoid cannot working safely and reliably because of the excessive Z of the causing source converter of voltage and current, and then improved reliability and the fail safe of convertible frequency air-conditioner.
When 100 work of above-mentioned electric machine control system, the derivative circuit (as shown in Figure 4) of Z source converter consisting of Z source converter 103, switching tube 104 and filter circuit 105 voltage after rectification circuit 102 rectifications carries out delivering to inverter 106 after multiplication of voltage processing, in this process, as shown in Figure 4, suppose that the inductance value of the first inductance L 1 and the second inductance L 2 is identical and be Lx, the capacitance of the first storage capacitor C1 and the second storage capacitor C2 is identical and be Cx, be L1=L2=Lx, C1=C2=Cx, the voltage U of the first storage capacitor C1
c1voltage U with the second storage capacitor C2
c2equate U
c1=U
c2=U
cx, the voltage U of the first inductance L 1
l1voltage U with the second inductance L 2
l2equate U
l1=U
l2=U
lx.When switching tube 104 conducting, diode D1 is anti-inclined to one side, the voltage of rectification circuit 102 outputs cannot be delivered to rear class by diode D1, the power supply of rear class load is supplied with and is provided by the first storage capacitor C1 and the second storage capacitor C2, the output current of filter circuit 105 can reduce, the current reference direction of supposing the first storage capacitor C1 and the second storage capacitor C2 makes progress at (from the negative pole of electric capacity toward positive extreme direction):
U
Lx=U
Cx （1）
The voltage U of diode D1 negative electrode
d=2U
cx, the input of switching tube 104 and the voltage U between output
qbe 0, inductive current I
lxequal capacitance current I
cx, and the voltage U of the 3rd inductance L 3
l3output voltage U with the derivative circuit of Z source converter
osum is 0, that is:
U
L3=-U
O （2）
When switching tube 104 turn-offs, diode D1 forward conduction, it is rear class load supplying that the first inductance L 1 and the second inductance L 2 are assisted the input power of diode D1, the output current of filter circuit 105 can increase, due to the output voltage U of diode D1 negative electrode
dequal the input voltage Ui of its anode, now the voltage of the first inductance L 1 and the second inductance L 2 by Ui and U
cxdetermine according to the following formula:
U
Lx=Ui－U
Cx （3）
And the voltage U of the 3rd inductance L 3
l3by U
cx, U
lxand U
odetermine according to the following formula:
U
L3=U
Cx－U
Lx－U
O （4）
According to above-mentioned relation formula (3) and (4), can obtain following relational expression:
U
L3=2U
Cx－Ui－U
O（5）
The switch periods of supposing switching tube 104 is T, and duty ratio is D, and the ON time of switching tube 104 is DT, and the turn-off time is (1-D) T.From stable state inductive magnetic flux conservation, the mean value of the both end voltage of the first inductance L 1, the second inductance L 2 and the 3rd inductance L 3 is 0, so during the whole switch periods of switching tube 104, according to relational expression (1) and (3), U
lxmean value
be shown below:
By above formula (6), can be obtained:
In addition, according to relational expression (2) and (5), the voltage U of the 3rd inductance L 3
l3mean value
be shown below:
By above formula (8), can be obtained:
Therefore, from relational expression (7) and (9), can obtain U
o=U
cx, the sensitizing factor of the derivative circuit of Z source converter consisting of Z source converter 103, switching tube 104 and filter circuit 105 is
and from relational expression (9), the duty ratio D of switching tube 104 must be less than 0.5, otherwise cannot realize the object of boosting, so the derivative circuit of Z source converter can be broken through the limitation of traditional B OOST circuit topology, can be in the situation that the duty ratio of switching tube 104 be less than the higher direct voltage of 0.5 output, D is less than 0.5 and makes the current inner loop of dicyclo in controlling without slope compensation, and the turn-off time of switching tube 104 be greater than ON time, be conducive to the heat radiation of switching tube 104.
In addition the filter circuit 105 that, the 3rd inductance L 3 and the second electrochemical capacitor C3 form can play the effect that filtering is processed to the output voltage of the derivative circuit of Z source converter.
In sum, the embodiment of the present invention comprises the electric machine control system based on Z source converter of soft starting circuit, rectification circuit, Z source converter, switching tube, filter circuit and inverter by employing, surge convertible frequency air-conditioner being produced when starting by soft starting circuit suppress to prevent rectification circuit and Z source converter because of moment overcurrent cause power switch tripping operation and device overcurrent to damage, guaranteed the job security of system.
Moreover, by Z source converter, the derivative circuit of Z source converter that switching tube and filter circuit form guarantees that the conducting duty ratio of switching tube is less than at 0.5 o'clock and can improves boost capability, and the deadline of switching tube is long, be conducive to heat radiation, by inverter AC motor, turn round simultaneously, and by control unit control inverter, Z source converter is realized to wide region Regulation Control and Power Factor Correction Control, thereby there is straight-through phenomenon in the upper and lower bridge arm switching tube that allows inverter, improved the job security of inverter, eliminated the impact on the output current harmonics of inverter that arranges of Dead Time, and the torque ripple and the noise that has reduced motor of motor have been reduced.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the electric machine control system based on Z source converter, is connected with motor, comprises control unit, and described control unit is connected with the indoor set of convertible frequency air-conditioner; It is characterized in that, described electric machine control system also comprises:
Soft starting circuit, rectification circuit, Z source converter, switching tube, filter circuit and inverter;
The input of described soft starting circuit is connected respectively the live wire end of electrical network and the positive input terminal of described rectification circuit with output, the first control end of described soft starting circuit is connected described control unit with the second control end, the negative input end of described rectification circuit connects the zero line side of described electrical network, the positive output end of described rectification circuit connects the positive input terminal of described Z source converter, the negative output terminal of described rectification circuit is connected with the negative input end of described Z source converter, the positive output end of described Z source converter connects the input of described switching tube and the input of described filter circuit simultaneously, the positive output end of described filter circuit connects the positive input terminal of described inverter, the negative output terminal of described Z source converter connects the output of described switching tube simultaneously, the negative output terminal of described filter circuit and the negative input end of described inverter, a plurality of control ends of the control end of described switching tube and described inverter are all connected with described control unit, the U phase output terminal of described inverter, V phase output terminal and W phase output terminal connect described motor, described inverter includes brachium pontis switching tube and lower brachium pontis switching tube.
2. electric machine control system as claimed in claim 1, it is characterized in that, described soft starting circuit comprises relay and positive temperature coefficient resistor, first of described relay is controlled contact and second and is controlled the first control end and the second control end that contact is respectively described soft starting circuit, the common contact of the switch contact of described relay and the first end of described positive temperature coefficient resistor is as the input of described soft starting circuit, and the common contact of the second end of the normally opened contact of described relay and described positive temperature coefficient resistor is as the output of described soft starting circuit.
3. electric machine control system as claimed in claim 1, it is characterized in that, described rectification circuit comprises rectifier bridge and the first electrochemical capacitor C, the positive input terminal of described rectifier bridge and negative input end are respectively positive input terminal and the negative input end of described rectification circuit, the anodal common contact of the output of described rectifier bridge and described the first electrochemical capacitor C is as the positive output end of described rectification circuit, and the common contact of the negative pole of the earth terminal of described rectifier bridge and described the first electrochemical capacitor C is as the negative output terminal of described rectification circuit.
4. electric machine control system as claimed in claim 1, is characterized in that, described Z source converter comprises:
Diode D1, the first inductance L 1, the first storage capacitor C1, the second storage capacitor C2 and the second inductance L 2;
The anode of described diode D1 is the positive input terminal of described Z source converter, the positive pole of the negative electrode of described diode D1 and described the first storage capacitor C1 is connected to the first end of described the first inductance L 1 altogether, the anodal common contact of the second end of described the first inductance L 1 and described the second storage capacitor C4 is as the positive output end of described Z source converter, the common contact of the first end of the negative pole of described the second storage capacitor C2 and described the second inductance L 2 is as the negative input end of described Z source converter, the common contact of the second end of the negative pole of described the first storage capacitor C1 and described the second inductance L 2 is as the negative output terminal of described Z source converter.
5. electric machine control system as claimed in claim 1, is characterized in that, described switching tube is IGBT or metal-oxide-semiconductor.
6. electric machine control system as claimed in claim 5, is characterized in that, described switching tube is IGBT, and the grid of described IGBT, collector and emitter are respectively control end, input and the output of described switching tube.
7. electric machine control system as claimed in claim 1, it is characterized in that, described filter circuit comprises the 3rd inductance L 3 and the second electrochemical capacitor C3, the first end of described the 3rd inductance L 3 is the input of described filter circuit, the anodal common contact of the second end of described the 3rd inductance L 3 and described the second electrochemical capacitor C3 is as the positive output end of described filter circuit, the negative output terminal that the negative pole of described the second electrochemical capacitor C3 is described filter circuit.
8. electric machine control system as claimed in claim 1, is characterized in that, described inverter comprises:
The first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube;
The common contact of the input of the input of the input of described the first switching tube and described second switch pipe and described the 3rd switching tube is as the positive input terminal of described inverter, the common contact of the input of the output of described the first switching tube and described the 4th switching tube is as the U phase output terminal of described inverter, the common contact of the input of the output of described second switch pipe and described the 5th switching tube is as the V phase output terminal of described inverter, the common contact of the input of the output of described the 3rd switching tube and described the 6th switching tube is as the W phase output terminal of described inverter, the common contact of the output of the output of the output of described the 4th switching tube and described the 5th switching tube and described the 6th switching tube is as the negative input end of described inverter, the control end of described the first switching tube, the control end of described second switch pipe, the control end of described the 3rd switching tube, the control end of described the 4th switching tube, the control end of the control end of described the 5th switching tube and described the 6th switching tube is respectively the first control end of described inverter, the second control end, the 3rd control end, the 4th control end, the 5th control end and the 6th control end, and be connected with described control unit,
Wherein, the upper brachium pontis switching tube that described the first switching tube, described second switch pipe and described the 3rd switching tube are described inverter, the lower brachium pontis switching tube that described the 4th switching tube, described the 5th switching tube and described the 6th switching tube are described inverter.
9. electric machine control system as claimed in claim 1, it is characterized in that, described inverter is Intelligent Power Module, the high voltage end of described Intelligent Power Module and earth terminal are respectively as positive input terminal and the negative input end of described inverter, the mutually electric output of U of described Intelligent Power Module, the mutually electric output of V and the mutually electric output of W are respectively U phase output terminal, V phase output terminal and the W phase output terminal of described inverter, and the upper brachium pontis switching tube of described Intelligent Power Module is all connected with described control unit with lower brachium pontis switching tube.
10. a convertible frequency air-conditioner, comprises indoor set and motor, it is characterized in that, described convertible frequency air-conditioner also comprises the electric machine control system based on Z source converter as described in claim 1 to 9 any one.
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| CN105162339A (en) * | 2015-07-24 | 2015-12-16 | 哈尔滨工业大学 | Z-source matrix rectifier and vector modulation method thereof |
| CN105743370A (en) * | 2016-03-29 | 2016-07-06 | 中国科学院电工研究所 | Superconductive energy storage converter and modulation mode thereof |
| CN106856369A (en) * | 2017-01-13 | 2017-06-16 | 西京学院 | A kind of quasi- Z source converters of capacitance network type |
| CN107634669A (en) * | 2017-11-15 | 2018-01-26 | 福建万润新能源科技有限公司 | The power circuit and its control method of position-sensor-free permagnetic synchronous motor |
| CN107748301A (en) * | 2017-11-24 | 2018-03-02 | 南方电网科学研究院有限责任公司 | A kind of high voltage direct current filter capacitor noise testing loaded circuit |
| CN109617413A (en) * | 2019-01-30 | 2019-04-12 | 上海艾为电子技术股份有限公司 | Boost chip and its mode switching circuit |
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| CN105743370A (en) * | 2016-03-29 | 2016-07-06 | 中国科学院电工研究所 | Superconductive energy storage converter and modulation mode thereof |
| CN105743370B (en) * | 2016-03-29 | 2019-05-03 | 中国科学院电工研究所 | A kind of superconducting energy storage current transformer and its modulation system |
| CN106856369A (en) * | 2017-01-13 | 2017-06-16 | 西京学院 | A kind of quasi- Z source converters of capacitance network type |
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