CN112455417B - Permanent magnet synchronous range extender transient power generation coordination control method - Google Patents

Permanent magnet synchronous range extender transient power generation coordination control method Download PDF

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CN112455417B
CN112455417B CN202011271283.5A CN202011271283A CN112455417B CN 112455417 B CN112455417 B CN 112455417B CN 202011271283 A CN202011271283 A CN 202011271283A CN 112455417 B CN112455417 B CN 112455417B
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range extender
working condition
rotating speed
controller
torque
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CN112455417A (en
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姚栋伟
沈俊昊
吴锋
侯珏
吕成磊
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0666—Engine torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The invention discloses a permanent magnet synchronous range extender transient power generation coordination control method which is used for inhibiting the overshoot phenomenon of the range extender power generation power under a transient working condition and ensuring the stable transition of the range extender power generation working condition point. The range extender controller judges whether the range extender is in a steady-state working condition or a transient working condition by comparing the difference value between the request rotating speed and the actual rotating speed with the set threshold value, and performs additional intervention on a power generation working condition point under the transient working condition; when the range extender is in a transient working condition, the motor control mode is adjusted to be a torque control mode to operate, a target torque compensation quantity signal is introduced, and the target torque compensation quantity signal is added with the original target torque and then sent to the engine controller, so that the transient power control process is corrected. The invention ensures the high dynamic response speed of the range extender power and simultaneously considers the stability of the transient process; meanwhile, the method makes full use of the functions of the motor controller products in the current market, has strong operability and has practical application prospect.

Description

Permanent magnet synchronous range extender transient power generation coordination control method
Technical Field
The invention relates to the field of extended range electric vehicle control, in particular to a permanent magnet synchronous range extender transient power generation power coordination control method which is mainly used for preventing the occurrence of a power overshoot phenomenon in the transient power generation working condition migration process of a permanent magnet synchronous range extender so as to ensure the stable transition of the power generation working condition point of the range extender under the transient working condition.
Background
Under the background of increasingly severe environmental problems and increasingly tense energy supply, the trend of the current automobile industry is to increase the degree of motorization of automobiles. By comprehensively considering the current technical level and industrial layout, the development of the extended range electric vehicle is more widely concerned as a technical route with stronger implementability. Through reasonable matching and control, the power system of the extended-range electric automobile can completely meet the power requirement of the vehicle during normal running, and meanwhile, excellent oil consumption and emission performance are obtained.
At present, a main range extender adopts a structure that an engine is directly coupled with a permanent magnet synchronous motor, and the range extender is simple in structure and convenient to control. When the external request power of the range extender is switched, the range extender controller can decouple the internal request power into signals of a request rotating speed and a request torque, and the signals are respectively sent to the engine or the permanent magnet synchronous motor according to the requirements of the control mode. For example, in the case where the engine torque-motor speed control mode is selected, the range extender controller may send a speed control mode command and a target speed command to the motor controller and a torque control mode command and a target torque command to the engine controller. By the method, the multi-operating-point control of the range extender can be realized, the steady-state power requirement of the whole vehicle is met as much as possible, and the following problems also exist in the aspect of transient power control:
when the permanent magnet synchronous range extender is in a power generation working condition, the power generation working condition point needs to be adjusted timely so as to meet the requirements of power and energy management of the whole vehicle. Taking an engine torque-motor rotating speed control mode as an example, when a power generation working condition point shifts and a power demand changes to cause target torque and rotating speed changes, a rotating speed instruction can always respond normally and quickly, but a situation that large deviation exists between motor input torque and target torque possibly occurs in a torque instruction quick response process, and then a result that power overshoot is large is caused. The reasons for this undesirable result are mainly twofold: firstly, because the crankshaft of the engine and the rotor of the motor have rotational inertia, inertia loss exists in the torque transmission process, so that when the engine reaches the target torque, the torque actually transmitted to the motor still has deviation; in addition, under the condition that the engine torque per se does not change greatly in a power generation curve under the condition of high-power generation, the motor per se can adjust the torque to meet the requirement of a rotating speed closed loop, and the torque adjusting mode accelerates the dynamic response speed, but easily causes overlarge torque deviation.
In view of the analysis, the invention designs and develops a permanent magnet synchronous range extender transient power generation coordination control method, which can ensure the stable transition of the power generation working condition point of the range extender and effectively inhibit the phenomenon of power overshoot, and has important significance for the development of the range-extended electric automobile.
Disclosure of Invention
The invention provides a permanent magnet synchronous range extender transient power coordination control method aiming at the problem of transient power control of the existing permanent magnet synchronous range extender. The method can identify the current internal request power switching condition of the range extender, adjust the motor control mode according to the requirement, introduce a target torque compensation quantity signal, add the target torque compensation quantity signal with the original target torque and send the target torque compensation quantity signal to the engine controller, and therefore correction of the transient power control process is achieved. The method can effectively inhibit the phenomenon that the actual power is overshot at the initial regulation stage under the transient working condition, and finally achieves a better control effect.
The purpose of the invention is realized by the following technical scheme: a permanent magnet synchronous range extender transient power generation coordination control method is used for the power generation working condition of the permanent magnet synchronous range extender aiming at an engine torque-motor rotating speed control mode; the method comprises the following specific steps:
(1) after receiving an external request power command sent by the vehicle control unit, a range extender controller in the permanent magnet synchronous range extender obtains internal request power in a feedforward and feedback mode according to the working state of the current permanent magnet synchronous range extender and decouples the internal request power into signals requesting rotating speed and torque.
(2) The difference exists between the actual rotating speed and the requested rotating speed in the process of the migration of the power generation working condition points of the permanent magnet synchronous range extender. Comparing the requested rotating speed with the actual rotating speed through the range extender controller, and judging whether the range extender is in a steady-state working condition or a transient working condition:
let the requested speed be nreqThe actual rotational speed is nREThe difference Δ n between the requested rotational speed and the actual rotational speed is equal to nreq-nRE(ii) a Setting a differential rotational speed threshold to Δ nallowIf the absolute value of the difference in rotational speed is | Δ n | < Δ nallowAnd if the permanent magnet synchronous range extender is in a steady-state working condition, no additional intervention is needed for the power generation working condition point. At the moment, the range extender controller sends a rotating speed control mode command and a target to the motor controllerA speed command to send a torque control mode command and a target torque command to an engine controller;
if the absolute value | Δ n | of the difference in rotational speed is greater than or equal to Δ nallowIf the permanent magnet synchronous range extender is in the transient working condition, additional intervention needs to be performed aiming at the power generation working condition point.
(3) When the range extender is in the transient working condition, in order to realize the transient power and ensure the stable transition of the power generation working condition point, the range extender controller switches the motor control mode, sends a torque control mode command to the motor controller and sends a target torque to the motor controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, is sent to the engine controller along with the torque control mode command. The target torque compensation amount Δ T is the requested rotation speed nreqAnd the actual speed nREIs multiplied by the scaling factor k, and when the requested rotational speed is greater than the actual rotational speed, the target torque compensation amount Δ T is a positive value; when the requested rotation speed is less than the actual rotation speed, the target torque compensation amount Δ T takes a negative value.
Further, the rotational speed difference threshold value is Δ nallowThe smaller the threshold value is, the stronger the intervention on the transient working condition is, the more stable the transition of the power generation working condition point is, but the dynamic response speed of the system becomes slower; the larger the threshold value is, the weaker the intervention on the transient working condition is, the faster the dynamic response speed of the system is, but the phenomenon of power overshoot is easier to occur.
Furthermore, when the range extender is in a transient working condition, the target torque compensation quantity signal is introduced to enlarge the torque difference, so that the motor does not need to actively change the torque to accelerate the rotating speed response, the rotating speed of the range extender and the torque fluctuation of the motor are more stable, and the stable transition of a power generation working condition point is ensured.
Further, when the step (3) is executed, the range extender controller in the step (2) compares the requested rotating speed and the actual rotating speed, and when the difference value between the requested rotating speed and the actual rotating speed is smaller than the set threshold value, the range extender controller restores the control mode of the engine torque and the motor rotating speed, and the target torque compensation quantity signal is also immediately failed.
Further, for the power generation working condition of the permanent magnet synchronous range extender, when the permanent magnet synchronous range extender is in an engine rotating speed-motor torque control mode. After receiving an external request power command sent by the vehicle control unit, the range extender controller obtains internal request power in a feedforward and feedback mode according to the current working state of the range extender and decouples the internal request power into signals requesting rotating speed and torque. Under a steady-state working condition, the range extender controller sends a rotating speed control mode command and a target rotating speed command to the engine controller, and sends a torque control mode command and a target torque command to the motor controller. Under the transient working condition, the range extender controller switches the engine control mode, sends a torque control mode command to the engine controller and sends a target torque to the engine controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, is sent to the motor controller along with the torque control mode command. The rest control logics, including the judgment method of the transient working condition and the steady-state working condition and the calculation process of the target torque compensation amount, are the same as those when the engine torque-motor rotating speed control mode is selected.
The invention has the beneficial effects that:
1. when the permanent magnet synchronous range extender is in a power generation working condition, the transient working condition is corrected in a mode of introducing a target torque compensation quantity signal through a switching motor control mode. The method fully utilizes the function that a mature motor controller product in the current market is compatible with a rotating speed control mode and a torque control mode, has simple and easy control logic and strong operability, effectively avoids the phenomenon of output power overshoot at the initial regulation stage possibly occurring during output power switching, and can ensure the stable transition of the power generation working point of the range extender;
2. and judging whether the range extender is in a steady-state working condition or a transient working condition by using the difference value between the requested rotating speed and the actual rotating speed, wherein whether the two intervention means (switching motor control mode and introducing a target torque compensation quantity signal) are implemented depends on whether the range extender is in the steady-state working condition or the transient working condition, and the target torque compensation quantity can be timely adjusted by changing a proportionality coefficient. The method ensures the high dynamic response speed of the range extender power, gives consideration to the stability of the transient process, has strong system adaptability and has practical application prospect.
Drawings
FIG. 1 shows a control logic of the power generation condition of a permanent magnet synchronous range extender;
FIG. 2 is a response curve when the power coordination control method is adopted;
fig. 3 is a response curve when the power coordination control method is not adopted.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples.
The invention provides a transient power generation power coordination control method for a permanent magnet synchronous range extender, which is mainly used for the power generation working condition of the permanent magnet synchronous range extender and mainly takes an engine torque-motor rotating speed control mode as an example for explanation. The control logic of the permanent magnet synchronous range extender under the power generation working condition is shown in figure 1.
(1) The permanent magnet synchronous range extender is in a power generation working condition, for example, an engine torque-motor rotating speed control mode is selected, after the range extender controller receives an external request power command sent by the vehicle control unit, the range extender controller obtains internal request power in a feedforward and feedback mode according to the current working state of the range extender, and the internal request power is decoupled into signals of a request rotating speed and a request torque.
(2) When the external request power is changed and the range extender is in a transient working condition, the difference value exceeding the set threshold value may exist between the actual rotating speed and the request rotating speed in the process of the range extender shifting the power generation working condition point. Therefore, in order to determine whether the range extender is in a steady state operating condition or a transient state operating condition, the range extender controller needs to constantly compare the requested rotating speed with the actual rotating speed:
let the requested speed be nreqThe actual rotational speed is nREThe difference Δ n between the requested rotational speed and the actual rotational speed is equal to nreq-nRE(ii) a The set threshold value is DeltanallowSize of thresholdThe smaller the threshold value is, the stronger the intervention on the transient working condition is, the more stable the transition of the power generation working condition point is, but the dynamic response speed of the system can become slower; the larger the threshold value is, the weaker the intervention on the transient working condition is, the faster the dynamic response speed of the system is, but the phenomenon of power overshoot is easier to occur. If absolute value of rotation speed difference | Δ n | < Δ nallowAnd if so, indicating that the range extender is in a steady-state working condition, and no additional intervention is needed for the power generation working condition point. Controlling the motor to run in a rotating speed control mode according to a certain example, sending a rotating speed control mode command and a target rotating speed command to the motor controller by the range extender controller, and sending a torque control mode command and a target torque command to the engine controller;
if the absolute value | Δ n | of the difference in rotational speed is greater than or equal to Δ nallowIf the current is in the transient working condition, the range extender needs to perform additional intervention aiming at the power generation working condition point, and the intervention is performed by switching the motor control mode and introducing a target torque compensation quantity signal.
(3) Once the range extender is in the transient working condition, in order to realize the transient power and ensure the stable transition of the power generation working condition point, the range extender controller switches the motor control mode, sends a torque control mode command to the motor controller and sends a target torque to the motor controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, is sent to the engine controller along with the torque control mode command.
(4) When the range extender is in a transient working condition, a target torque compensation quantity signal is required to be introduced, and the purpose of introducing the signal is to expand the torque difference, so that the motor does not need to actively change the torque to accelerate the rotating speed response. The target torque compensation amount Δ T is the requested rotation speed nreqAnd the actual rotational speed nREIs multiplied by the scaling factor k, and when the requested rotational speed is greater than the actual rotational speed, the target torque compensation amount Δ T is a positive value; when the requested rotation speed is less than the actual rotation speed, the target torque compensation amount Δ T takes a negative value.
(5) And (3) when the range extender is in the transient working condition, the torque difference existing at two ends of the shaft of the engine and the motor is enlarged by switching the motor control mode and introducing a target torque compensation quantity signal, so that the fluctuation of the rotating speed of the range extender and the torque of the motor is more stable, and the stable transition of a power generation working condition point is ensured.
(6) In the process of executing the step (3) and the step (4), the rotation speed difference determination of the step (2) is also synchronously performed. Once the difference value between the requested rotating speed and the actual rotating speed is smaller than the set threshold value, the range extender controller restores the control mode of the engine torque-motor rotating speed, and the target torque compensation quantity signal is also immediately invalid.
When the range extender is in the transient working condition, if the power coordination control method is adopted for intervention, the fluctuation conditions of the power, the torque and the rotating speed in the whole process are shown in fig. 2; if the power coordination control method is not adopted for intervention, the phenomenon that the actual power is overshot at the initial stage of regulation under the transient working condition can be caused, and the fluctuation conditions of the power, the torque and the rotating speed in the whole process are shown in fig. 3. The power coordination control method can effectively reduce the output power fluctuation of the range extender, avoid the phenomenon that the actual power is overshot at the initial regulation stage under the transient working condition, and ensure the stable transition of the power generation working condition points.
The method can also be used for the power generation working condition of the permanent magnet synchronous range extender, and when the engine speed-motor torque control mode is selected. At the moment, after the range extender controller receives an external request power command sent by the vehicle control unit, the internal request power is obtained in a feedforward and feedback mode according to the current working state of the range extender, and the internal request power is decoupled into signals requesting the rotating speed and the torque. Under a steady-state working condition, the range extender controller sends a rotating speed control mode command and a target rotating speed command to the engine controller, and sends a torque control mode command and a target torque command to the motor controller. Under the transient working condition, the range extender controller switches the engine control mode, sends a torque control mode command to the engine controller and sends a target torque to the engine controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, is sent to the motor controller along with the torque control mode command. The rest control logics, including the judgment method of the transient working condition and the steady-state working condition and the calculation process of the target torque compensation amount, are the same as those when the engine torque-motor rotating speed control mode is selected.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (3)

1. A permanent magnet synchronous range extender transient power generation coordination control method is characterized in that the method is used for the power generation working condition of the permanent magnet synchronous range extender aiming at an engine torque-motor rotating speed control mode; the method comprises the following specific steps:
(1) after a range extender controller in the permanent magnet synchronous range extender receives an external request power command sent by a vehicle control unit, internal request power is obtained in a feedforward and feedback mode according to the working state of the current permanent magnet synchronous range extender, and the internal request power is decoupled into signals requesting rotating speed and torque;
(2) the difference value exists between the actual rotating speed and the requested rotating speed in the process of the migration of the permanent magnet synchronous range extender at the power generation working condition point; comparing the requested rotating speed with the actual rotating speed through the range extender controller, and judging whether the range extender is in a steady-state working condition or a transient working condition:
let the requested speed be nreqThe actual rotational speed is nREThe difference Δ n between the requested rotational speed and the actual rotational speed is equal to nreq-nRE(ii) a Setting a differential rotational speed threshold to Δ nallowIf the absolute value of the difference in rotational speed is | Δ n | < Δ nallowIf the permanent magnet synchronous range extender is in a steady-state working condition, no additional intervention is needed for a power generation working condition point; at the moment, the range extender controller sends a rotating speed control mode command and a target rotating speed command to the motor controller, and sends a torque control mode command and a target torque command to the engine controller;
if the absolute value of the difference in rotational speed|Δn|≥ΔnallowIf the permanent magnet synchronous range extender is in the transient working condition, additional intervention is required for the power generation working condition point;
(3) when the range extender is in the transient working condition, in order to realize the transient power and ensure the stable transition of the power generation working condition point, the range extender controller switches the motor control mode, sends a torque control mode command to the motor controller and sends a target torque to the motor controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, and a torque control mode command to the engine controller; the torque difference is enlarged, so that the motor does not need to actively change the torque to accelerate the response of the rotating speed, the fluctuation of the rotating speed of the range extender and the torque of the motor is more stable, and the stable transition of a power generation working condition point is ensured; the target torque compensation amount Δ T is the requested rotation speed nreqAnd the actual rotational speed nREIs multiplied by the scaling factor k, and when the requested rotational speed is greater than the actual rotational speed, the target torque compensation amount Δ T is a positive value; when the requested rotating speed is less than the actual rotating speed, the target torque compensation quantity delta T is a negative value; and (3) simultaneously executing the step, comparing the requested rotating speed and the actual rotating speed by the range extender controller in the step (2), and when the difference value between the requested rotating speed and the actual rotating speed is smaller than a set threshold value, recovering the control mode of the engine torque and the motor rotating speed by the range extender controller, and immediately disabling the target torque compensation quantity signal.
2. The method for coordinately controlling transient power generation power of a permanent magnet synchronous range extender according to claim 1, wherein the threshold value of the speed difference is Δ nallowThe smaller the threshold value is, the stronger the intervention on the transient working condition is, the more stable the transition of the power generation working condition point is, but the dynamic response speed of the system becomes slower; the larger the threshold value is, the weaker the intervention on the transient working condition is, the faster the dynamic response speed of the system is, but the phenomenon of power overshoot is easier to occur.
3. A permanent magnet according to claim 1The coordinated control method for the transient power generation power of the synchronous range extender is characterized in that for the power generation working condition of the permanent magnet synchronous range extender, the permanent magnet synchronous range extender is in an engine rotating speed-motor torque control mode; after receiving an external request power command sent by the vehicle control unit, the range extender controller obtains internal request power in a feed-forward and feedback mode according to the current working state of the range extender and decouples the internal request power into signals requesting rotating speed and torque; under a steady-state working condition, the range extender controller sends a rotating speed control mode command and a target rotating speed command to the engine controller, and sends a torque control mode command and a target torque command to the motor controller; under the transient working condition, the range extender controller switches the engine control mode, sends a torque control mode command to the engine controller and sends a target torque to the engine controller; the range extender controller calculates a target torque compensation amount delta T and adds the target torque compensation amount delta T to an original target torque TcmdAdding to obtain a corrected target torque command T'cmd＝Tcmd+ Δ T, and a torque control mode command to the motor controller; the rest control logics, including the judgment method of the transient working condition and the steady-state working condition and the calculation process of the target torque compensation amount, are the same as those when the engine torque-motor rotating speed control mode is selected.
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