An on-board motor and controller integrated structure

Abstract

The utility model relates to motor technical field especially relates to a kind of airborne motor and controller integration structure, including motor, the motor one end is provided with rear end cover, the one end of rear end cover is provided with mounting cavity, controller is installed in the mounting cavity, the mounting cavity is provided with several heat dissipation openings, for the heat generated when controller works is heat conduction heat dissipation;The controller is connected with the motor, and the one end of the rear end cover is detachably connected with the shell of the motor;The controller is connected voltage / current sensor by control loop, and the controller is connected motor by output loop, for controller according to the response time of the control loop of voltage / current adjustment control according to the collected voltage / current, and the damping coefficient of output loop is adjusted, so that the voltage / current of motor dynamic output is stable;The utility model generator heat dissipation effect is not good, improves generator power supply quality simultaneously.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a kind of airborne motor and controller integration structure. BACKGROUND

[0002] Generator controller is the important component of airborne generator, and the existing generator controller is separated from generator, and does not rotate with generator, which is not conducive to heat dissipation, when there is large current on controller, the heat generated on generator controller makes that generator heat dissipation effect is bad, and generator controller also has the problem of not being able to control the stable voltage output of generator, thereby affecting the power supply quality of generator.

[0003] Therefore, it is necessary to design a motor controller to improve the above problems. SUMMARY

[0004] In order to solve the problems of the prior art, the utility model provides a kind of airborne motor and controller integration structure, including motor, the one end of the motor is provided with rear end cover, the one end of the rear end cover is provided with installation cavity, the controller is installed in the installation cavity, a plurality of heat dissipation openings are provided on the installation cavity for heat dissipation of heat generated by the controller during operation;

[0005] The controller is connected with the motor, and the one end of the rear end cover is detachably connected with the shell of the motor.

[0006] The controller is connected with the voltage / current sensor through the control loop, and the controller is connected with the motor through the output loop, for adjusting the response time of the control loop and adjusting the damping coefficient of the output loop according to the collected voltage / current, so that the voltage / current output by the motor is stable.

[0007] Further, the controller is a PID controller.

[0008] Further, the output loop includes three-phase alternating current, and the two ends of the three-phase alternating current are connected to three-phase rectifier, auxiliary power supply and excitation source in series to form the output loop.

[0009] Further, the voltage of the auxiliary power supply is 12V, and the excitation source adopts PWM digital control constant current source.

[0010] Further, the three-phase rectifier is a three-phase bridge rectifier filter circuit for converting three-phase alternating current to direct current, including three-phase power supply input end, rectifier bridge circuit and filter circuit, characterized in that the rectifier bridge circuit is composed of multiple rectifier tubes, the three-phase power supply input end is connected with the rectifier bridge circuit, and the output end of the rectifier bridge circuit is connected with the filter circuit.

[0011] Further, the reverse withstand voltage of the rectifier tube in the rectifier bridge circuit is greater than or equal to 100V, and the working current of the rectifier tube in the rectifier bridge circuit is greater than or equal to 50A.

[0012] Further, the forward voltage drop of the diode in the three-phase bridge rectification filter circuit is less than or equal to 0.7V.

[0013] Further, the filter capacitor in the three-phase bridge rectification filter circuit is a low-loss capacitor, the withstand voltage value of the filter capacitor is selected as 50Vdc according to the output parameter of the generator, and the capacitor capacity is 6000uf.

[0014] The utility model discloses the beneficial effects of:

[0015] By installing the controller on the rear end cover of the motor, the controller rotates with the motor, when a large current passes through the controller, a plurality of heat dissipation openings are opened on the mounting cavity of the rear end cover, and the heat dissipation openings are used for heat dissipation of the heat generated by the controller during operation, so that the generator has poor heat dissipation effect, and the controller is connected with the voltage / current sensor through the control loop, the controller is connected with the motor through the output loop, the controller adjusts the response time of the control loop and the damping coefficient of the output loop according to the collected voltage / current, so that the voltage / current dynamically output by the motor is stable, and the power supply quality of the generator is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the front view of the rear end cover of the utility model;

[0017] Fig. 2 The utility model provides output loop connection schematic diagram.

[0018] Reference signs:

[0019] In the drawing: 1-rear end cover, 2-mounting cavity, 3-three-phase rectifier, 4-accessory power supply, 5-PWM digital control constant current source. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Please refer to Figs. 1-2The utility model provides a kind of airborne motor and controller integration structure, including motor, the one end of motor is provided with rear end cover 1, the one end of rear end cover 1 is provided with installation cavity 2, controller is installed in installation cavity 2, a plurality of heat dissipation openings are provided on installation cavity 2, for the heat generated when controller works is heat conduction heat dissipation;

[0022] The controller is connected with the motor, one end of the rear end cover 1 is detachably connected with the shell of the motor;

[0023] The controller is connected with the voltage / current sensor through a control loop, and the controller is connected with the motor through an output loop, to adjust the response time of the control loop and the damping coefficient of the output loop according to the collected voltage / current, so that the voltage / current output by the motor is stable.

[0024] Further, the controller is a PID controller.

[0025] It is necessary to adjust the response time of the control loop: PID controller is a common controller type in industrial control. By adjusting the three parameters of proportion (P), integral (I) and derivative (D), the response time of the control loop is affected. The proportional term adjusts the output quickly according to the current error, the integral term eliminates the steady-state error, and the derivative term adjusts in advance according to the rate of error change. For example, in the generator voltage control, if the voltage output is higher than the set value (error is positive), the proportional term will reduce the output to reduce the error; the integral term will accumulate the influence of this error over time to ensure accurate control; the derivative term will suppress the trend of rapid voltage rise to prevent overshoot. Reasonable adjustment of these three parameters can effectively adjust the response time of the control loop to adapt to different system dynamic characteristics. This adjustment is based on timely feedback and processing of errors, so that the system can quickly and stably reach the desired output voltage or current value; the control algorithm in the PID controller is based on the combination of proportional (P), integral (I) and derivative (D) control actions, which can automatically adjust the parameters of the controller according to the running state of the system. In the generator control system, the dynamic characteristics of the system may change with factors such as load changes, generator state changes, etc. The control algorithm can monitor these changes in real time and adjust the parameters of the control loop accordingly to optimize the response time. For example, when the generator load suddenly increases, the adaptive algorithm can detect the downward trend of the voltage and automatically increase the weight of the proportional term to speed up the response of the controller, so that the output voltage can quickly recover to stable. This automatic adjustment according to the actual running situation makes the control loop maintain good response performance under different working conditions, effectively improving the stability of the voltage / current output. The implementation of adjusting the damping coefficient of the output loop: choose the appropriate damping element, the damping element is the inductance in three-phase alternating current, the inductance has the characteristic of hindering the change of current. Adding inductance in the output loop can smooth the fluctuation of current. When the current changes, the inductance will generate a counter electromotive force to resist the change of current, so that the change of current is more gentle. In the case of unstable generator output voltage, inductance can indirectly stabilize the voltage output by suppressing the sudden change of current. At the same time in the PID controller, the adjustment of damping coefficient can be integrated into the control algorithm of PID controller. For example, combine the damping coefficient with the proportional term, integral term and derivative term to form a new control rule. When the fluctuation of output voltage / current is detected to be large, the damping coefficient can be appropriately increased to adjust the output through the controller, so that the dynamic characteristics of the output loop are more stable. This software-level adjustment can flexibly change the damping coefficient according to the real-time running state of the system, without the need for large-scale hardware modification, improving the adjustability and adaptability of the system;

[0026] The depth of the mounting cavity is 20 mm, the diameter of the mounting cavity matches the outer diameter of the controller, and the diameter of the mounting cavity is 148 mm; the performance requirements of the controller are: working voltage: DC 7V-30V (generator rectifier output); three-phase rectifier 3 output rated 28.5V, range 22V-29V, current <50A; excitation output: range 0-5A; accuracy 1%; control mode: constant current output; the controller is used to complete the rectification conversion of three-phase alternating current to direct current 28.5V; it can complete the voltage stabilization control (excitation voltage regulation) of alternating current 28.5V output; output overcurrent protection 42A, turn off the excitation source;

[0027] It is worth noting that the existing controller is separated from the generator and does not rotate with the generator. The present application realizes the control of the weight and heat dissipation of the controller and combines the controller with the rear end cover 1 of the generator. The weight of the controller is about 1 kg, and the small weight of the controller makes the entire generator system lighter and easier to carry. By mounting the controller on the rear end cover of the motor, the controller rotates with the motor. When the controller passes through a large current of more than 50A, the power devices and heat generating devices in the controller are directly bonded on the rear end cover 1, and a plurality of heat dissipation openings are opened on the mounting cavity 2 of the rear end cover 1. The heat dissipation openings are used to conduct and dissipate the heat generated by the controller during operation, so that the heat dissipation effect of the generator is not good. At the same time, the controller is connected with the voltage / current sensor through the control loop, and the controller is connected with the motor through the output loop, which is used to control the response time of the control loop and the damping coefficient of the output loop according to the collected voltage / current, so that the voltage / current dynamically output by the motor is stable. Since the voltage / current dynamically output by the motor is stable, the power supply quality of the generator is improved.

[0028] Further, the output loop includes three-phase alternating current, and two ends of the three-phase alternating current are connected to three-phase rectifier 3, auxiliary power supply 4 and excitation source in series to form an output loop.

[0029] Further, the voltage of the auxiliary power supply 4 is 12V; the excitation source adopts a PWM digital control constant current source 5, and the output current of the excitation source is 0-3A. The control accuracy is 1%, and the control loop adjustment time is designed to be 1s to meet the requirement of <5s of the system. The voltage adjustment range is selected according to the working voltage and current requirements of the excitation coil;

[0030] Further, the three-phase rectifier 3 is a three-phase bridge rectifier filter circuit for converting three-phase alternating current to direct current, which includes a three-phase power input end, a rectifier bridge circuit and a filter circuit. The rectifier bridge circuit is composed of a plurality of rectifier tubes. The three-phase power input end is connected with the rectifier bridge circuit, and the output end of the rectifier bridge circuit is connected with the filter circuit.

[0031] The rectifier tubes in the rectifier bridge circuit are connected according to the connection mode of the common cathode group and the common anode group of the three-phase bridge rectification filter circuit, the rectifier tube with the highest anode potential in the common cathode group is preferentially turned on, and the rectifier tube with the lowest cathode potential in the common anode group is preferentially turned on.

[0032] Further, the reverse withstand voltage of the rectifier tube in the rectifier bridge circuit is greater than or equal to 100V, so as to ensure that the rectifier tube can withstand the reverse voltage that may occur without being broken down during normal operation of the circuit; the working current of the rectifier tube in the rectifier bridge circuit is greater than or equal to 50A, so as to meet the current bearing requirement of the rectifier bridge circuit during normal operation and ensure stable operation of the rectifier bridge circuit.

[0033] Further, the forward voltage drop of the diode in the three-phase bridge rectification filter circuit is less than or equal to 0.7V.

[0034] Further, the filter capacitor in the three-phase bridge rectification filter circuit is a low-loss capacitor, the withstand voltage of the filter capacitor is selected to be 50Vdc according to the output parameter of the generator, and the capacitance is 6000uf.

[0035] It should be noted that the rectifier tube in the three-phase bridge rectification filter circuit is a fast recovery diode with a reverse withstand voltage greater than or equal to 100V, a working current greater than or equal to 50A, and a forward voltage drop less than or equal to 0.7V, which is directly attached to the rear end cover 1 of the motor for heat dissipation. The filter capacitor is a low-loss capacitor, the withstand voltage is selected according to the output parameter of the generator (50Vdc), and the capacitance is 6000uf.

[0036] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated structure of airborne motor and controller, characterized in that, The device includes a motor, one end of which is provided with a rear end cover, and one end of the rear end cover is provided with a mounting cavity. A controller is installed in the mounting cavity, and the mounting cavity is provided with several heat dissipation vents for conducting and dissipating the heat generated by the controller during operation. The controller is connected to the motor, and one end of the rear cover is detachably connected to the motor housing; The controller is connected to a voltage / current sensor via a control loop, and the controller is connected to a motor via an output loop. The controller adjusts the response time of the control loop and the damping coefficient of the output loop based on the collected voltage / current, so that the voltage / current dynamically output by the motor is stable.

2. The integrated structure of airborne motor and controller according to claim 1, characterized in that, The controller is a PID controller.

3. The integrated structure of airborne motor and controller according to claim 1, characterized in that, The output circuit includes three-phase alternating current, with the two ends of the three-phase alternating current connected to a three-phase rectifier, an auxiliary power supply, and an excitation source connected in series to form the output circuit.

4. The integrated structure of airborne motor and controller according to claim 3, characterized in that, The auxiliary power supply voltage is 12V; the excitation source adopts a PWM digitally controlled constant current source.

5. The integrated structure of airborne motor and controller according to claim 3, characterized in that, The three-phase rectifier is a three-phase bridge rectifier and filter circuit used to convert three-phase AC to DC. It includes a three-phase power input terminal, a rectifier bridge circuit, and a filter circuit. The rectifier bridge circuit is composed of multiple rectifier tubes. The three-phase power input terminal is connected to the rectifier bridge circuit, and the output terminal of the rectifier bridge circuit is connected to the filter circuit.

6. The integrated structure of airborne motor and controller according to claim 5, characterized in that, The reverse withstand voltage of the rectifier tube in the rectifier bridge circuit is ≥100V, and the operating current of the rectifier tube in the rectifier bridge circuit is ≥50A.

7. The integrated structure of airborne motor and controller according to claim 5, characterized in that, The forward voltage drop of the diodes in the three-phase bridge rectifier filter circuit is ≤0.7V.

8. The integrated structure of airborne motor and controller according to claim 5, characterized in that, The filter capacitor in the three-phase bridge rectifier filter circuit is a low-loss capacitor. The withstand voltage of the filter capacitor is selected as 50Vdc based on the generator output parameters, and the capacitance is 6000uf.

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