CN216033693U - Electric drive system for driving motor directly connected with transmission by variable frequency generator set - Google Patents
Electric drive system for driving motor directly connected with transmission by variable frequency generator set Download PDFInfo
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- CN216033693U CN216033693U CN202122804207.2U CN202122804207U CN216033693U CN 216033693 U CN216033693 U CN 216033693U CN 202122804207 U CN202122804207 U CN 202122804207U CN 216033693 U CN216033693 U CN 216033693U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 56
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 230000009347 mechanical transmission Effects 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model discloses an electric drive system for driving a motor directly connected with a transmission by using a variable frequency generator set. The power system comprises a variable frequency generator set, the variable frequency generator set comprises an internal combustion engine and a generator, and the internal combustion engine is in transmission connection with the generator; the driving system comprises an electric motor and a transmission, the electric motor is in transmission connection with the transmission, and the generator is electrically connected with the electric motor. The control system comprises an internal combustion engine throttle control mechanism, a constant speed selection switch, an internal combustion engine rotating speed controller, a generator rotating speed sensor and a generator voltage regulator, wherein the internal combustion engine throttle control mechanism and the internal combustion engine rotating speed controller are mechanically or electrically connected with the internal combustion engine, the constant speed selection switch and the generator rotating speed sensor are electrically connected with the internal combustion engine rotating speed controller, and the generator voltage regulator is electrically connected with the generator.
Description
Technical Field
The utility model relates to the technical field of electric drive systems, in particular to an electric drive system for driving a motor by a variable frequency generator set to be directly connected with a transmission.
Background
At present, the power system of engineering walking machinery (engineering special vehicle, engineering machinery and the like) mostly adopts the traditional mode of 'internal combustion engine-clutch-transmission', and for electric walking machinery, the pure electric mode of 'storage battery-motor' is mainly used; for the configuration of an internal combustion engine, a clutch and a transmission, the walking machinery with double power (the power of upper-mounted operation equipment and the walking power of a chassis) wastes the repeated power configuration, so that the utilization rate of the equipment is low, and the cost is increased; the actual cost of the 'pure electric' walking machinery is almost twice that of the same type of machinery, and moreover, the charging time is long, and the endurance mileage is short, so that the machine is an insurmountable short plate.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned existing technical shortcomings, the present invention provides an electric drive system for driving a motor directly connected to a transmission by a variable frequency generator set, so as to solve the problems in the background art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides an electric drive system for driving a motor directly connected with a speed changer by using a variable frequency generator set, which comprises a power system, a drive system and a control system, the power system comprises a variable frequency generator set, the variable frequency generator set comprises an internal combustion engine and a generator, the internal combustion engine is in transmission connection with the generator, the driving system comprises an electric motor and a speed changer, the electric motor is in transmission connection with the speed changer, the generator is electrically connected with the motor, the control system comprises an internal combustion engine throttle control mechanism, a constant speed selection switch, an internal combustion engine rotating speed controller, a generator rotating speed sensor and a generator voltage regulator, the internal combustion engine throttle control mechanism and the internal combustion engine rotating speed controller are mechanically or electrically connected with the internal combustion engine, the constant speed selection switch and the generator rotating speed sensor are electrically connected with the internal combustion engine rotating speed controller, and the generator voltage regulator is electrically connected with the generator.
Preferably, the internal combustion engine is a gasoline engine, a diesel engine, a natural gas engine or an ethanol fuel engine.
Preferably, the throttle control mechanism of the internal combustion engine adopts a lever or a pull-cord type mechanical transmission mechanism, and can also adopt an electronic control mechanism.
Preferably, the motor adopts an alternating current permanent magnet motor, an alternating current synchronous or asynchronous motor and an alternating current variable frequency motor.
Preferably, the transmission adopts a reducer with a fixed speed ratio, a multi-gear, a manual transmission with a multi-speed ratio or an automatic transmission.
Preferably, when the generator is electrically connected with the plurality of motors connected in parallel, a control switch is arranged between the generator and the motors, and the total power of the motors driven in parallel is smaller than the total power of the variable frequency generator set.
The utility model has the beneficial effects that:
(1) the utility model uses the variable frequency generator set to drive the motor to directly connect with the electric drive system of the speed changer to realize the configuration of replacing double power by one set of power, thereby not only reducing the manufacturing cost of the whole vehicle, but also greatly reducing the use cost.
(2) The performance parameters of the internal combustion engine, the generator, the motor and the transmission are reasonably matched, and the high-efficiency and energy-saving effect can be achieved, so that an electric drive system mainly comprising a vector frequency converter can be replaced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an electric drive system using a variable frequency generator set to drive an electric motor directly coupled to a transmission according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electric drive system for driving a plurality of motors directly connected to a transmission in parallel by a variable frequency generator set according to an embodiment of the present invention in FIG. 1;
FIG. 3 is a graph of voltage-frequency (v-f) output characteristics of a conventional generator;
FIG. 4 is a graph of voltage-frequency (v-f) output characteristics of a low frequency voltage compensated generator.
Description of reference numerals:
1-an internal combustion engine accelerator control mechanism, 2-an internal combustion engine, 3-an internal combustion engine rotating speed controller, 4-a generator, 5-a generator voltage regulator, 6-a motor, 7-a transmission, 8-an internal combustion engine constant speed selection switch, 9-a generator rotating speed sensor and 10-a control switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-4, the present invention provides an electric drive system for driving an electric motor directly connected to a transmission by a variable frequency generator set, comprising a power system, a drive system and a control system;
the power system comprises a variable frequency generator set, the variable frequency generator set comprises an internal combustion engine 2 and a generator 4, and the internal combustion engine 2 is in transmission connection with the generator 4;
the driving system comprises an electric motor 6 and a speed changer 7, wherein the electric motor 6 is in transmission connection with the speed changer 7;
the generator 4 is electrically connected with the motor 6;
the control system comprises an internal combustion engine accelerator control mechanism 1, a constant speed selection switch 8, an internal combustion engine rotating speed controller 3, a generator rotating speed sensor 9 and a generator voltage regulator 5. The internal combustion engine accelerator control mechanism 1 and the internal combustion engine rotating speed controller 3 are mechanically or electrically connected with the internal combustion engine 2, the constant speed selection switch 8 and the generator rotating speed sensor 9 are electrically connected with the internal combustion engine rotating speed controller 3, and the generator voltage regulator 5 is electrically connected with the generator 4;
the internal combustion engine accelerator control mechanism 1 is used for controlling the rotating speed of the internal combustion engine 2 so as to control the rotating speed of the whole generator set, and the generator set outputs variable-frequency and variable-voltage alternating current with frequency changing synchronously with the rotating speed;
the generator voltage regulator 5 is mainly responsible for synchronously regulating the output voltage of the generator 4 according to the characteristic requirements set by different loads along with the change of the rotating speed (frequency) above the fundamental frequency so as to meet the torque characteristic of the driven motor 6.
A predetermined rotation speed signal is input to the internal combustion engine rotation speed controller 2 by using the constant speed selection switch 8, meanwhile, the actual rotation speed signal of the generator 4 is simultaneously input to the internal combustion engine rotation speed controller 2 by the generator rotation speed sensor 9 for comparison, the internal combustion engine rotation speed controller 2 controls the generator set to stably operate at the rotation speed set by the constant speed selection switch 8, the generator set outputs alternating current with set frequency and voltage, and therefore the motor 6 operates at the rotation speed determined by the set frequency and voltage.
When the fixed speed selection switch 8 is set at the rated speed position of the generator 4, the variable frequency generator set stably outputs alternating current with the frequency of 50 or 60 Hz and 220 or 380V, so that the motor 6 stably operates at the rated speed.
The constant speed selection switch 8 is closed, the rotating speed control signal input by the internal combustion engine accelerator control mechanism 1 is directly input to the internal combustion engine rotating speed controller 2 to control the rotating speed of the internal combustion engine 2, so that the generator set outputs a variable-frequency and variable-voltage alternating current which changes synchronously with the rotating speed, the variable-frequency and variable-voltage alternating current is output to the motor 6, the torque characteristic of the motor is improved through the speed changer 7, and the load stepless speed change operation is realized.
The internal combustion engine 2 is a gasoline engine, a diesel engine, a natural gas engine or an ethanol fuel engine.
The throttle control mechanism 1 of the internal combustion engine adopts a lever or a stay wire type mechanical transmission mechanism and can also adopt an electronic control mechanism.
The motor 6 adopts an alternating current permanent magnet motor, an alternating current synchronous or asynchronous motor and an alternating current variable frequency motor.
The transmission 7 adopts a speed reducer with fixed speed ratio, a manual transmission or an automatic transmission with multiple gears and multiple speed ratios, and has the function of expanding the speed regulation and output torque range of the motor.
When the generator 4 is electrically connected with a plurality of motors 6 connected in parallel, a control switch 10 is arranged between the generator 4 and the motors 6, the motors 6 can be selectively driven through the control switch 10, and when the variable frequency generator set simultaneously drives a plurality of motors provided with different configurations and provided with transmissions in parallel, the sum of the motor powers driven in parallel at the same time is less than the total power of the variable frequency generator set.
The working principle is as follows:
the utility model relates to an electric drive system for driving a motor directly connected with a transmission by using a variable frequency generator set. The throttle control mechanism 1 of the internal combustion engine is used for controlling the rotating speed of the internal combustion engine through the rotating speed controller 2 of the internal combustion engine, so that the rotating speed of the whole generator set is controlled; the generator voltage regulator 5 is mainly responsible for synchronously regulating the output voltage of the generator along with the change of the rotating speed (frequency) within the range from the fundamental frequency to the rated frequency, so that the output voltage and the frequency (v/f) meet the torque characteristic required by the motor 6, and the generator set outputs a variable-frequency alternating current which is changed synchronously with the rotating speed, although the variable-frequency alternating current can drive the motor 6 to run in a stepless speed change manner, the output torque characteristic cannot perfectly meet the requirement of a load, particularly the requirement of the variable load on the torque characteristic, therefore, a reducer with a fixed speed ratio is directly connected to the output end of the motor 6 to increase the output torque; for the frequently changing loads, such as the walking chassis of a walking machine, a multi-gear and multi-speed-ratio manual or automatic transmission is directly connected to the output end of the motor 6, so that the output torque is increased, and the speed regulation range is expanded.
The voltage-frequency (v-f) characteristic of the output of the conventional generator set is shown in fig. 3, the voltage/frequency (v/f) ratio of the output of the generator set is basically constant in the full rotating speed range of the generator set, and since the torque characteristic of the output of the generator set driving the motor in the low frequency range is soft, the low frequency voltage compensation is performed by the generator voltage regulator according to the characteristic curve shown in fig. 4, so that the purpose of outputting the hard torque characteristic in the full rotating speed range is achieved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides an electrically driven system who directly links derailleur with variable frequency generating set driving motor, includes driving system, actuating system and control system, driving system includes variable frequency generating set, its characterized in that: the variable-frequency generator set comprises an internal combustion engine and a generator, the internal combustion engine is in transmission connection with the generator, the driving system comprises an electric motor and a transmission, the electric motor is in transmission connection with the transmission, the generator is electrically connected with the electric motor, the control system comprises an internal combustion engine throttle control mechanism, a constant speed selection switch, an internal combustion engine rotating speed controller, a generator rotating speed sensor and a generator voltage regulator, the internal combustion engine throttle control mechanism and the internal combustion engine rotating speed controller are mechanically or electrically connected with the internal combustion engine, the constant speed selection switch and the generator rotating speed sensor are electrically connected with the internal combustion engine rotating speed controller, and the generator voltage regulator is electrically connected with the generator.
2. The electric drive system of claim 1 for driving an electric motor direct-connected transmission with a variable frequency generator set, wherein: the internal combustion engine adopts a gasoline engine, a diesel engine, a natural gas engine or an ethanol fuel engine.
3. The electric drive system of claim 1 for driving an electric motor direct-connected transmission with a variable frequency generator set, wherein: the throttle control mechanism of the internal combustion engine can adopt a lever or a stay wire type mechanical transmission mechanism and can also adopt an electronic control mechanism.
4. The electric drive system of claim 1 for driving an electric motor direct-connected transmission with a variable frequency generator set, wherein: the motor adopts an alternating current permanent magnet motor, an alternating current synchronous or asynchronous motor and an alternating current variable frequency motor.
5. The electric drive system of claim 1 for driving an electric motor direct-connected transmission with a variable frequency generator set, wherein: the speed changer adopts a speed reducer with fixed speed ratio, a multi-gear, multi-speed ratio manual speed changer or an automatic speed changer.
6. The electric drive system of claim 1 for driving an electric motor direct-connected transmission with a variable frequency generator set, wherein: when the generator is electrically connected with the motors connected in parallel, a control switch is arranged between the generator and the motors, and the total power of the motors driven in parallel is smaller than the total power of the variable-frequency generator set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804207.2U CN216033693U (en) | 2021-11-16 | 2021-11-16 | Electric drive system for driving motor directly connected with transmission by variable frequency generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122804207.2U CN216033693U (en) | 2021-11-16 | 2021-11-16 | Electric drive system for driving motor directly connected with transmission by variable frequency generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216033693U true CN216033693U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122804207.2U Active CN216033693U (en) | 2021-11-16 | 2021-11-16 | Electric drive system for driving motor directly connected with transmission by variable frequency generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216033693U (en) |
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2021
- 2021-11-16 CN CN202122804207.2U patent/CN216033693U/en active Active
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Effective date of registration: 20240422 Address after: Building 1-101, No. 31, North District, Feicui County, CNHTC, No.13 Xigonghe Road, Tianqiao District, Jinan City, Shandong Province, 250000 Patentee after: Jinan Asia Trent Machinery Technology Co.,Ltd. Country or region after: China Address before: 250000 room 1217, 12th floor, Sanlian building, No. 12, Baotuquan North Road, Lixia District, Jinan City, Shandong Province Patentee before: Shandong Tanaka Machinery Equipment Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |