CN109873554A - A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise - Google Patents
A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise Download PDFInfo
- Publication number
- CN109873554A CN109873554A CN201910314680.7A CN201910314680A CN109873554A CN 109873554 A CN109873554 A CN 109873554A CN 201910314680 A CN201910314680 A CN 201910314680A CN 109873554 A CN109873554 A CN 109873554A
- Authority
- CN
- China
- Prior art keywords
- coupling
- input terminal
- motor
- output end
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of methods for eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise, and described method includes following steps: Step 1: building close coupling multiple branch circuit motor-drive circuit topology；Step 2: changing the phase of 4n-1 voltage source inverter, so that carrier phase differs 360 °/4n phase between 4n voltage source inverter, it is zero to force the sum of the odd times PWM harmonic current in a plurality of branch of close coupling multiple branch circuit motor, thoroughly eliminates close coupling multiple branch circuit motor odd-multiple PWM frequency noise.Method of the invention not only maintains the fast advantage of traditional circuit topology dynamic response, the electric and magnetic oscillation of motor odd times PWM frequency can also effectively be eliminated, and then reduce the noise of motor PWM frequency, the volume for significantly reducing the output filter of power converter, has high application value and economic value.
Description
Technical field
The present invention relates to a kind of methods for eliminating motor PWM noise, are used for multiple branch circuit close coupling motor driven systems.
Background technique
Traditional motor driver or power converter generallys use SVPWM strategy or SPWM carries out busbar voltage
Modulation, to obtain three-phase alternating voltage.But it modulates containing a large amount of harmonic wave in obtained phase voltage and phase current, wherein high
Subharmonic is concentrated mainly near PWM frequency and its integer multiple frequency.And electric current can be inspired on motor PWM frequency and its
The vibration and noise of integer multiple frequency.
Existing motor driver or gird-connected inverter do not have the ability for inhibiting PWM noise, common method usually
It is to improve PWM switching frequency and using LC filter.Improving PWM frequency will increase the switching loss of inverter, cause driver
Fever, the method are not suitable for large-power occasions.And the noise of PWM frequency is filtered out using traditional LC filter, be primarily present with
Lower three disadvantages: (1) inductance of LC filter can pass through the rated current of motor.Inductance is saturated in order to prevent, inductor iron core
Bulky is added significantly to the weight and cost of LC filter.(2) introducing of LC filter can increase electric machine control system
Order, so that the control characteristic of current of electric is deteriorated, the dynamic property of system is reduced.(3) inductance of LC filter itself and electricity
Hold the impedance that will increase route, increases the loss of system.
Summary of the invention
The object of the present invention is to provide a kind of methods for eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise, simultaneously
In the topology for joining the additional coupling inductance driving of inverter, using the special winding construction of motor and phase-shifting carrier wave, so that multiple branch circuit
The harmonic wave magnetomotive force that the harmonic current of middle odd times PWM frequency generates is cancelled out each other, to eliminate the vibration of motor odd times PWM frequency
It is dynamic, and then eliminate the electromagnetic noise of the frequency.This method can effectively inhibit the high-frequency electrical magnetic noise of multiple branch circuit close coupling motor
Sound significantly reduces the volume of power converter output filter.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of close coupling multi-branch permanent magnet synchronous motor PWM noise is eliminated, is included the following steps:
Step 1: building close coupling multiple branch circuit motor-drive circuit topology
The close coupling multiple branch circuit motor-drive circuit topology includes that 4n(n is positive integer) a voltage source inverter VSI1, VSI2,
VSI3...VSI4n；4n branch close coupling motor M and three identical coupling inductance La, Lb, Lc, in which:
4n voltage source inverter VSI1, VSI2, VSI3...VSI4n are connected in parallel on same bus DC_link；
The output terminals A 1 of voltage source inverter VSI1 is connected with the 1st input terminal of coupling inductance La, output end B1 and coupling inductance
The 1st input terminal of Lb is connected, and output end C1 is connected with the 1st input terminal of coupling inductance Lc；
The output terminals A 2 of voltage source inverter VSI2 is connected with the 2nd input terminal of coupling inductance La, output end B2 and coupling inductance
The 2nd input terminal of Lb is connected, and output end C2 is connected with the 2nd input terminal of coupling inductance Lc；
The output terminals A 3 of voltage source inverter VSI3 is connected with the 3rd input terminal of coupling inductance La, output end B3 and coupling inductance
The 3rd input terminal of Lb is connected, and output end C3 is connected with the 3rd input terminal of coupling inductance Lc；
The output terminals A 4n of voltage source inverter VSI4n is connected with the 4n input terminal of coupling inductance La, output end B4n and coupling
The 4n input terminal of inductance Lb is connected, and output end C4n is connected with the 4n input terminal of coupling inductance Lc；
The 1st output end of coupling inductance La is connected with the input terminal x1 in 4n branch close coupling motor M, and the 1st of coupling inductance Lb the
Output end is connected with the input terminal y1 in 4n branch close coupling motor M, the 1st output end of coupling inductance Lc and 4n branch close coupling
Input terminal z1 in motor M is connected；
The 2nd output end of coupling inductance La is connected with the input terminal x2 in 4n branch close coupling motor M, and the 2nd of coupling inductance Lb the
Output end is connected with the input terminal y2 in 4n branch close coupling motor M, the 2nd output end of coupling inductance Lc and 4n branch close coupling
Input terminal z2 in motor M is connected；
The 3rd output end of coupling inductance La is connected with the input terminal x3 in 4n branch close coupling motor M, and the 3rd of coupling inductance Lb the
Output end is connected with the input terminal y3 in 4n branch close coupling motor M, the 3rd output end of coupling inductance Lc and 4n branch close coupling
Input terminal z3 in motor M is connected；
The 4n output end of coupling inductance La is connected with the input terminal x4n in 4n branch close coupling motor M, and the of coupling inductance Lb
4n output end is connected with the input terminal y4n in 4n branch close coupling motor M, and the 4n output end and 4n branch of coupling inductance Lc is strong
Input terminal z4n in coupling electric machine M is connected；
The inductance value of coupling inductance La, Lb, Lc must be greater than the phase inductance of a certain branch in close coupling motor M, to guarantee carrier wave
The odd times PWM harmonic current of single branch is unlikely to excessive after phase shift；
Step 2: implementing phase-shifting carrier wave
Change the phase of 4n-1 voltage source inverter, so that carrier phase differs between 4n voltage source inverter
360 °/4n phase, then the sum of the odd times PWM harmonic voltage of 4n voltage source inverter output is 0, due to a plurality of branch
Symmetry makes so that forcing the sum of the odd times PWM harmonic current in a plurality of branch of close coupling multiple branch circuit motor is zero in close coupling
The sum of the harmonic wave magnetomotive force generated in multiple branch circuit motor M air gap is zero, to thoroughly eliminate close coupling multiple branch circuit motor odd-multiple
PWM frequency noise.
Compared with the prior art, the present invention has the advantage that
Method of the invention not only maintains the fast advantage of traditional circuit topology dynamic response, additionally it is possible to it is odd effectively to eliminate motor
The electric and magnetic oscillation of secondary PWM frequency, and then the noise of motor PWM frequency is reduced, significantly reduce the output filtering of power converter
The volume of device has high application value and economic value.
Detailed description of the invention
Multiple branch circuit close coupling motor-drive circuit topology when Fig. 1 is using conventional method；
Fig. 2 is the multiple branch circuit close coupling motor-drive circuit topology applied in method proposed by the present invention；
Fig. 3 is inverter (VSI) topology；
Fig. 4 is coupling inductance (La, Lb, Lc) schematic diagram；
Fig. 5 is the multiple branch circuit close coupling noise of motor using conventional method；
Fig. 6 is to use multiple branch circuit close coupling noise of motor of the present invention.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawing, and however, it is not limited to this, all to this
Inventive technique scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered
Within the protection scope of the present invention.
Multiple branch circuit close coupling motor in the present invention refers to the multiple branch circuit close coupling motor of 4 integral multiple, and such as 4 branches are strong
Coupling electric machine, 8 branch close couplings or 12 branch close coupling motors, each branch is identical in the space angle of motor, between branch
Coupling inductance is very big.
By taking four branch close coupling motors as an example, as shown in Figure 1, the drive for the multiple branch circuit close coupling motor applied in conventional method
Dynamic circuit topology includes four voltage source inverters VSI1, VSI2, VSI3 and VSI4 and multiple branch circuit close coupling motor M.VSI's
Circuit topology is as shown in Figure 3.Four voltage source inverters VSI1, VSI2, VSI3 and VSI4 are connected in parallel on same bus DC_link
On；The output terminals A 1 of voltage source inverter VSI1, B1, C1 are connected with input terminal x1, y1, z1 in multiple branch circuit close coupling motor；
The output terminals A 2 of voltage source inverter VSI2, B2, C2 are connected with input terminal x2, y2, z2 in multiple branch circuit close coupling motor；Voltage
The output terminals A 3 of source inventer VSI3, B3, C3 are connected with input terminal x3, y3, z3 in multiple branch circuit close coupling motor；Voltage source is inverse
Become the output terminals A 4 of device VSI4, B4, C4 are connected with input terminal x4, y4, z4 in multiple branch circuit close coupling motor.Moreover, four electricity
The carrier phase of potential source inverter is identical, without phase difference.
The present invention proposes a kind of based on novel more on the basis of traditional multiple branch circuit close coupling driving method
The driving method of road close coupling motor driven topology.As shown in Fig. 2, its circuit topology include four voltage source inverter VSI1,
VSI2, VSI3 and VSI4；And multiple branch circuit close coupling motor M and three identical coupling inductance La, Lb, Lc.VSI1,
The circuit topology of VSI2, VSI3 and VSI4 are as shown in Figure 3.Four voltage source inverters VSI1, VSI2, VSI3 and VSI4 are connected in parallel on
On same bus DC_link.The output terminals A 1 of voltage source inverter VSI1 and the input terminal of coupling inductance LaIt is connected, output
Hold the input terminal of B1 and coupling inductance LbIt is connected, the input terminal of output end C1 and coupling inductance LcIt is connected.Voltage source inverter
The output terminals A 2 of device VSI2 and the input terminal of coupling inductance LaIt is connected, the input terminal of output end B2 and coupling inductance LbPhase
Even, the input terminal of output end C2 and coupling inductance LcIt is connected.The output terminals A 3 and coupling inductance La of voltage source inverter VSI3
Input terminalIt is connected, the input terminal of output end B3 and coupling inductance LbIt is connected, the input of output end C3 and coupling inductance Lc
EndIt is connected.The output terminals A 4 of voltage source inverter VSI4 and the input terminal of coupling inductance LaIt is connected, output end B4 and coupling
The input terminal of inductance LbIt is connected, the input terminal of output end C4 and coupling inductance LcIt is connected.The output end of coupling inductance La is 5.
It is connected with the input terminal x1 in multiple branch circuit close coupling motor, the output end of coupling inductance Lb is 5. and in multiple branch circuit close coupling motor
Input terminal y1 is connected, 5. the output end of coupling inductance Lc is connected with the input terminal z1 in multiple branch circuit close coupling motor.Coupling inductance
6. the output end of La is connected with the input terminal x2 in multiple branch circuit close coupling motor, the output end of coupling inductance Lb is 6. strong with multiple branch circuit
Input terminal y2 in coupling electric machine is connected, the output end of coupling inductance Lc 6. with the input terminal z2 phase in multiple branch circuit close coupling motor
Even.7. the output end of coupling inductance La is connected with the input terminal x3 in multiple branch circuit close coupling motor, the output end of coupling inductance Lb
7. being connected with the input terminal y3 in multiple branch circuit close coupling motor, the output end of coupling inductance Lc is 7. and in multiple branch circuit close coupling motor
Input terminal z3 be connected.8. the output end of coupling inductance La is connected with the input terminal x4 in multiple branch circuit close coupling motor, coupling electricity
8. and multiple branch circuit 8. the output end of sense Lb is connected with the input terminal y4 in multiple branch circuit close coupling motor, the output end of coupling inductance Lc
Input terminal z4 in close coupling motor is connected.
In the present invention, the structure of coupling inductance La, Lb, Lc are as shown in figure 4, four the number of turns of winding are identical on same iron core
Coil, iron core can have air gap or without air gap, and iron core is also not necessarily limited to the shape in figure, and canoe is not limited in figure
Mode.
Carrier phase by adjusting four voltage source inverters VSI1, VSI2, VSI3 and VSI4 differs 360 °/4n phase
Vibration and the noise harmonic wave of odd times PWM frequency are eliminated in position.When PWM frequency is 4.0 kHz, using the driver of conventional topologies
The high frequency electromagnetic noise and its frequency spectrum of the output of driving are as shown in figure 5, using the method for the present invention high frequency electromagnetic noise and its frequency spectrum
As shown in Figure 6.Comparison is as it can be seen that the PWM noise of 4.0 kHz and 12.0 kHz there's almost no.The present invention can be eliminated effectively
The electric and magnetic oscillation of motor odd times PWM frequency significantly reduces to be effectively reduced the human ear audible noise of PWM technology generation
The volume of power converter output filter.
Claims (2)
1. a kind of method for eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise, it is characterised in that the method includes such as
Lower step:
Step 1: building close coupling multiple branch circuit motor-drive circuit topology
The close coupling multiple branch circuit motor-drive circuit topology includes that 4n(n is positive integer) a voltage source inverter VSI1, VSI2,
VSI3...VSI4n；4n branch close coupling motor M and three identical coupling inductance La, Lb, Lc, in which:
4n voltage source inverter VSI1, VSI2, VSI3...VSI4n are connected in parallel on same bus DC_link；
The output terminals A 1 of voltage source inverter VSI1 is connected with the 1st input terminal of coupling inductance La, output end B1 and coupling inductance
The 1st input terminal of Lb is connected, and output end C1 is connected with the 1st input terminal of coupling inductance Lc；
The output terminals A 2 of voltage source inverter VSI2 is connected with the 2nd input terminal of coupling inductance La, output end B2 and coupling inductance
The 2nd input terminal of Lb is connected, and output end C2 is connected with the 2nd input terminal of coupling inductance Lc；
The output terminals A 3 of voltage source inverter VSI3 is connected with the 3rd input terminal of coupling inductance La, output end B3 and coupling inductance
The 3rd input terminal of Lb is connected, and output end C3 is connected with the 3rd input terminal of coupling inductance Lc；
The output terminals A 4n of voltage source inverter VSI4n is connected with the 4n input terminal of coupling inductance La, output end B4n and coupling
The 4n input terminal of inductance Lb is connected, and output end C4n is connected with the 4n input terminal of coupling inductance Lc；
The 1st output end of coupling inductance La is connected with the input terminal x1 in 4n branch close coupling motor M, and the 1st of coupling inductance Lb the
Output end is connected with the input terminal y1 in 4n branch close coupling motor M, the 1st output end of coupling inductance Lc and 4n branch close coupling
Input terminal z1 in motor M is connected；
The 2nd output end of coupling inductance La is connected with the input terminal x2 in 4n branch close coupling motor M, and the 2nd of coupling inductance Lb the
Output end is connected with the input terminal y2 in 4n branch close coupling motor M, the 2nd output end of coupling inductance Lc and 4n branch close coupling
Input terminal z2 in motor M is connected；
The 3rd output end of coupling inductance La is connected with the input terminal x3 in 4n branch close coupling motor M, and the 3rd of coupling inductance Lb the
Output end is connected with the input terminal y3 in 4n branch close coupling motor M, the 3rd output end of coupling inductance Lc and 4n branch close coupling
Input terminal z3 in motor M is connected；
The 4n output end of coupling inductance La is connected with the input terminal x4n in 4n branch close coupling motor M, and the of coupling inductance Lb
4n output end is connected with the input terminal y4n in 4n branch close coupling motor M, and the 4n output end and 4n branch of coupling inductance Lc is strong
Input terminal z4n in coupling electric machine M is connected；
Step 2: implementing phase-shifting carrier wave
Change the phase of 4n-1 voltage source inverter, so that carrier phase differs between 4n voltage source inverter
360 °/4n phase, so that forcing the sum of the odd times PWM harmonic current in a plurality of branch of close coupling multiple branch circuit motor is zero, thoroughly
Eliminate close coupling multiple branch circuit motor odd-multiple PWM frequency noise.
2. the method according to claim 1 for eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise, it is characterised in that
The inductance value of described coupling inductance La, Lb, Lc are greater than the phase inductance of a certain branch in close coupling motor M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314680.7A CN109873554A (en) | 2019-04-18 | 2019-04-18 | A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314680.7A CN109873554A (en) | 2019-04-18 | 2019-04-18 | A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109873554A true CN109873554A (en) | 2019-06-11 |
Family
ID=66922819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910314680.7A Pending CN109873554A (en) | 2019-04-18 | 2019-04-18 | A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109873554A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631691A (en) * | 2018-05-19 | 2018-10-09 | 哈尔滨工业大学 | Eliminate the circuit topology of the double three-phase machine PWM noises of H bridges driving |
| CN108649781A (en) * | 2018-05-19 | 2018-10-12 | 哈尔滨工业大学 | Eliminate the circuit topology of multiple-unit motor PWM noise |
-
2019
- 2019-04-18 CN CN201910314680.7A patent/CN109873554A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631691A (en) * | 2018-05-19 | 2018-10-09 | 哈尔滨工业大学 | Eliminate the circuit topology of the double three-phase machine PWM noises of H bridges driving |
| CN108649781A (en) * | 2018-05-19 | 2018-10-12 | 哈尔滨工业大学 | Eliminate the circuit topology of multiple-unit motor PWM noise |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI493861B (en) | Open delta motor drive with integrated recharge | |
| US9701208B2 (en) | Inverter | |
| JP6837069B2 (en) | Multi-level high speed variable speed drive | |
| Itoh et al. | Investigation of a two-stage boost converter using the neutral point of a motor | |
| CN109905065A (en) | A method of eliminating the double branch motor odd-multiple PWM frequency noises of close coupling | |
| CN108616214B (en) | Drive topology for eliminating PWM frequency noise of double three-phase motor | |
| Li et al. | Design of high-speed toroidal winding surface PM machine with SiC-based inverters | |
| CN201656894U (en) | Small and medium-sized three-phase digital generator set | |
| Ellabban et al. | Indirect field oriented control of an induction motor fed by a bidirectional quasi Z-source inverter | |
| CN108631691B (en) | Circuit topology for eliminating PWM noise of double three-phase motor driven by H bridge | |
| CN108540041B (en) | Circuit topology for eliminating PWM noise of double three-phase motor driven by H bridge | |
| CN109873554A (en) | A method of eliminating close coupling multi-branch permanent magnet synchronous motor PWM noise | |
| CN108649781A (en) | Eliminate the circuit topology of multiple-unit motor PWM noise | |
| Abdel-Khalik et al. | A nine-phase six-terminal fractional-slot-winding for interior permanent-magnet machines with low space harmonics | |
| Cougo et al. | Impact of PWM methods and load configuration in the design of intercell transformers used in parallel three-phase inverters | |
| EP3890173A1 (en) | Filter system for a converter circuit | |
| Abdel-Khalik et al. | Performance evaluation of an on-board integrated battery charger system using a 12-slot/10-pole surface-mounted PM propulsion motor | |
| CN107786114A (en) | A kind of new PWM inverter topological structure | |
| JP2003088177A (en) | Motor driving method based on multiple pwm inverter | |
| Xia et al. | Active damping control of modular multilevel converter with output filter for high-speed PM motor drive | |
| CN110034668B (en) | Method for eliminating PWM (pulse-width modulation) noise of strong-coupling double-branch motor driven by H bridge | |
| CN107636944A (en) | Dc bus ripple is reduced | |
| CN207128646U (en) | Charging electric vehicle and driving integrated converter based on H bridges and high frequency transformer | |
| CN110380662B (en) | Topology for eliminating PWM noise of double-branch motor | |
| CN110034667A (en) | A kind of circuit topology for eliminating the double branch motor high-frequency noises of close coupling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190611 |