Control system matched with various power load motor drivers

Abstract

The invention discloses a control system matched with various power load motor drivers, and relates to the technical field of load motor drivers. The system comprises a full-bridge inverter, a DSP controller, a power supply module and a load motor. The type of a load motor is identified through the DSP controller, the switching frequency multiple relation n of two bridge arm switching tubes is adjusted, and the inverter is controlled to output different currents and powers to adapt to loads in different power ranges. According to the system, an efficient heat dissipation structure is designed, all assemblies are installed in a cooling cover barrel, and rapid and efficient heat dissipation is achieved by means of a multi-layer heat dissipation mechanism of cooling liquid, a heat absorption plate disc, a rotary shifting plate, a temperature guide column, a spiral blade and the like in combination with heat conduction and forced convection. The driving motor adjusts the rotating speed of the spiral blade according to the calorific value and dynamically controls the heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of load motor drivers, and in particular to a control system for matching multiple power load motor drivers. Background Art

[0002] At present, high-power motors need to be matched with high-power drivers, and low-power motors need to be matched with low-power drivers. Mismatched load power or low matching will lead to low driver efficiency. To address this problem, a control method is needed to increase the load power range of the driver so that the driver can match load motors with a wide power range. In terms of heat dissipation, traditional motor drive systems usually use fixed heat dissipation methods, such as simple heat sinks or fans, which cannot be adjusted according to the actual heat generation of the system. When the system load changes, the heat dissipation effect cannot be dynamically matched, resulting in overheating or energy waste. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a control system for matching multiple power load motor drivers, including a full-bridge inverter, a DSP controller, a power module, and a load motor; the power module is connected to the full-bridge inverter to provide direct current to the full-bridge inverter, the DSP controller is connected to the full-bridge inverter to provide four-way pulse signals to control the output of the full-bridge inverter, and the load motor is connected to the full-bridge inverter to drive the load motor to move; the DSP controller sends four-way pulse signals to two switching devices on the two bridge arms of the full-bridge inverter according to the identified load motor type, and controls the on and off timing of the four switches in the two bridge arms to make the inverter output the corresponding current, so that the inverter outputs the corresponding power to match the corresponding load.

[0004] Preferably, the full-bridge inverter, DSP controller, and power module are all installed on the mounting plate, and the full-bridge inverter, DSP controller, power module, and load motor are all arranged inside the cooling hood barrel, the cooling hood barrel is installed on the mounting plate, and the bottom of the cooling hood barrel is connected to the mounting plate by sealant.

[0005] Preferably, a plurality of diverter ring plates are fixed along the axial direction on the inner wall of the cooling hood barrel, and each diverter ring plate is provided with a plurality of capillary holes; a sealing cover plate is fixedly and sealedly installed on the top of the cooling hood barrel, and a temperature conduction disk is rotatably installed on the lower surface of the sealing cover plate, and a plurality of rotating dial plates arranged in a circular array are fixed on the lower surface of the temperature conduction disk, and the rotation center of the rotating dial plate is coaxially arranged with the cooling hood barrel.

[0006] Preferably, a temperature conducting column fixed to the temperature conducting disk is also provided at the rotation center of all the rotating dial plates, and a plurality of heat absorbing disks are fixedly arranged at equal distances along the axial direction on the outer surface of the temperature conducting column.

[0007] Preferably, the temperature conducting column extends to above the sealing cover plate, and the temperature conducting column and the sealing cover plate are connected in a rotating sealed manner, and a driven turntable fixed to the temperature conducting column is rotatably mounted on the upper surface of the sealing cover plate.

[0008] Preferably, a driving motor is fixedly mounted on the outer surface of the cooling hood barrel, a driving pulley is fixed on the output shaft of the driving motor, and the driving pulley is connected to the driven turntable through a transmission belt.

[0009] Preferably, a heat sink is fixedly mounted on the driven turntable, and a plurality of spiral blades arranged in a circular array are fixedly mounted on the upper surface of the heat sink. The spiral blades and the heat sink are integrally formed, and the interiors of the heat sink and the spiral blades are hollow, and the heat sink and the hollow space inside the spiral blades are connected, and electronic fluoride liquid is arranged inside the heat sink.

[0010] Preferably, a cover plate is fixedly buckled on the sealing cover plate, the cover plate is rotatably matched with the heat sink, an air guide hood is fixed on the cover plate, an air inlet and an exhaust port are arranged on the air guide hood, the air inlet is coaxially arranged with the heat sink, and the air guide hood is buckled on the outside of the spiral blade.

[0011] Preferably, a heat absorbing sleeve is fixed on the outer surface of the cooling hood barrel, a connecting temperature conducting block is provided on the outer surface of the heat absorbing sleeve, a tail heat sink is fixed on the connecting temperature conducting block, and the tail heat sink is located in the exhaust port.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can improve the motor power range that the driver can adapt to, so that the driver can match motors with various power ranges and have high efficiency in various power ranges; (2) The heat generated by the full-bridge inverter, DSP controller, power module and load motor of the present invention during operation is effectively transferred and dissipated by the cleverly designed heat dissipation system. The multi-layer heat dissipation mechanism such as coolant, heat-absorbing plate, rotating dial, temperature-conducting column and spiral blade combines heat conduction and forced convection to quickly reduce the system temperature, ensure stable operation of the equipment and extend the service life; (3) By operating near the resonance point, the system can output the required power under low reactive power conditions, thereby improving energy utilization efficiency. By controlling the switching frequency and the frequency multiple relationship n, the inverter can operate in a resonant state, reducing the generation of reactive power, reducing the impact on the power grid and saving energy; (4) According to the system heat generation, the drive motor can be started at low speed or high speed, and the speed of the spiral blade and the rotating dial can be adjusted to achieve dynamic control of the heat dissipation efficiency. When the heat generation is high, the quick start improves the heat dissipation effect; when the heat generation is low, the speed is reduced to save energy. This design improves the intelligence level of the heat dissipation system and adapts to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the output power formula of the circuit of the present invention.

[0014] Figure 2 It is the maximum output power formula of the present invention.

[0015] Figure 3 It is the ratio formula of the output power of the present invention to the maximum output power.

[0016] Figure 4 is the normalized output power formula I of the inverter of the present invention.

[0017] Figure 5 This is the normalized output power formula II of the inverter of the present invention.

[0018] Figure 6 This is the normalized output power formula of the inverter of the present invention.

[0019] Figure 7 It is the maximum output power formula of the inverter in the resonant state of the present invention.

[0020] Figure 8 This is a circuit diagram of the control system of the present invention.

[0021] Fig. 9 The output curve diagram of the relationship between the output power and the switching frequency of the control system of the present invention in theory within various power ranges.

[0022] Fig.10 It is a schematic diagram of the structure of the heat absorbing sleeve of the present invention.

[0023] Fig.11 It is a schematic diagram of the structure of the air guide cover of the present invention.

[0024] Fig.12 It is a schematic diagram of the spiral blade structure of the present invention.

[0025] Fig.13 It is a schematic diagram of the sealing cover structure of the present invention.

[0026] Fig.14 It is a schematic diagram of the internal structure of the cooling hood barrel of the present invention.

[0027] In the figure: 101-cooling hood barrel; 102-rotating dial plate; 103-heat absorbing plate; 104-temperature conducting plate; 105-temperature conducting column; 106-diverter ring plate; 107-sealing cover plate; 108-transmission belt; 109-driven turntable; 110-driving pulley; 111-heat dissipation plate; 112-spiral blades; 113-cover plate; 114-driving motor; 115-air guide hood; 116-connecting temperature conducting block; 117-rear heat sink; 118-air inlet; 119-heat absorbing sleeve; 120-mounting plate; 121-exhaust port. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 14 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0029] The present invention provides a control system for matching multiple power load motor drivers, comprising a full-bridge inverter, a DSP controller, a power module, and a load motor; the power module is connected to the full-bridge inverter to provide direct current to the full-bridge inverter, the DSP controller is connected to the full-bridge inverter to provide four-channel pulse signals to control the output of the full-bridge inverter, and the load motor is connected to the full-bridge inverter to drive the load motor to move; The DSP controller sends four pulse signals to the two switch devices on the two bridge arms of the full-bridge inverter according to the identified load motor type. By controlling the on and off timing of the four switches in the two bridge arms, the inverter outputs the corresponding current and the inverter outputs the corresponding power to match the corresponding load.

[0030] The full-bridge inverter, DSP controller, and power module are all mounted on the mounting plate 120, and the full-bridge inverter, DSP controller, power module, and load motor are all arranged inside the cooling cover barrel 101, and the cooling cover barrel 101 is mounted on the mounting plate 120, and the bottom of the cooling cover barrel 101 is connected to the mounting plate 120 by a sealant. A plurality of flow dividing ring plates 106 are fixed along the axial direction on the inner wall of the cooling cover barrel 101, and a plurality of capillary through holes are opened on each flow dividing ring plate 106; a sealing cover plate 107 is fixedly and sealedly mounted on the top of the cooling cover barrel 101, and a temperature conducting plate 104 is rotatably mounted on the lower surface of the sealing cover plate 107, and a plurality of rotating dial plates 102 arranged in a circular array are fixed on the lower surface of the temperature conducting plate 104, and the rotation center of the rotating dial plate 102 is coaxially arranged with the cooling cover barrel 101. A heat conducting column 105 fixed to the heat conducting disk 104 is also provided at the rotation center of all rotating dial plates 102, and a plurality of heat absorbing discs 103 are fixedly arranged equidistantly along the axial direction on the outer surface of the heat conducting column 105. The heat conducting column 105 extends to the top of the sealing cover plate 107, and the heat conducting column 105 and the sealing cover plate 107 are connected in a rotating seal matching manner, and a driven turntable 109 fixed to the heat conducting column 105 is rotatably installed on the upper surface of the sealing cover plate 107. A driving motor 114 is fixedly installed on the outer surface of the cooling cover barrel 101, and a driving pulley 110 is fixed on the output shaft of the driving motor 114, and the driving pulley 110 and the driven turntable 109 are connected by a transmission belt 108.

[0031] A heat sink 111 is fixedly mounted on the driven turntable 109, and a plurality of spiral blades 112 arranged in a circular array are fixedly mounted on the upper surface of the heat sink 111. The spiral blades 112 and the heat sink 111 are integrally formed, and the interiors of the heat sink 111 and the spiral blades 112 are hollow, and the heat sink 111 and the hollow space inside the spiral blades 112 are connected, and an electronic fluoride liquid is arranged inside the heat sink 111. A cover plate 113 is fixedly buckled on the sealing cover plate 107, and the cover plate 113 is rotatably matched with the heat sink 111. An air guide cover 115 is fixed on the cover plate 113, and an air inlet 118 and an exhaust port 121 are arranged on the air guide cover 115. The air inlet 118 is coaxially arranged with the heat sink 111, and the air guide cover 115 is buckled on the outer side of the spiral blade 112. The outer surface of the cooling hood barrel 101 is fixed with a heat absorbing sleeve 119 , and the outer surface of the heat absorbing sleeve 119 is provided with a connecting temperature conducting block 116 , and a tail heat sink 117 is fixed on the connecting temperature conducting block 116 , and the tail heat sink 117 is located in the exhaust port 121 .

[0032] The full-bridge inverter, DSP controller, power module, and load motor will generate a lot of heat during operation. This part of heat will be transferred to the coolant (insulating liquid) inside the cooling cover barrel 101. The coolant will transfer the heat to the heat-absorbing plate 103 and the rotating dial 102, and then to the temperature-conducting column 105. The temperature-conducting column 105 transfers the heat to the driven turntable 109, and then the driven turntable 109 transfers the heat to the heat dissipation disk 111. At this time, the electronic fluoride liquid inside the heat dissipation disk 111 will be heated and evaporated, and the gaseous electronic fluoride liquid will move to the spiral blade 112. Since the temperature of the spiral blade 112 is relatively low, the gaseous The electronic fluorine liquid will condense and fall back into the heat sink 111 to continue absorbing heat. At this time, it is only necessary to start the drive motor 114 at a low speed. The output shaft of the drive motor 114 drives the active pulley 110, and the active pulley 110 drives the driven turntable 109 to rotate through the transmission belt 108. The rotation of the driven turntable 109 will drive the spiral blades 112 to rotate, and the spiral blades 112 will drive the air to be sucked into the air guide cover 115. The external cold air will enter the rotation center of all the spiral blades 112 through the air inlet 118, and then pass through the spiral blades 112, and drive the heat on the spiral blades 112, and then be discharged from the air guide cover 115 through the exhaust port 121.

[0033] When the heat generated by the full-bridge inverter, DSP controller, and power module is very high, the drive motor 114 is started quickly, and the output shaft of the drive motor 114 will quickly drive the driven turntable 109 to rotate. The rotation of the driven turntable 109 will rotate through the temperature conducting column 105 and the temperature conducting disk 104. At this time, the temperature conducting disk 104 will drive all the rotating dials 102 to rotate, and the rotating dials 102 will drive the coolant inside the cooling cover barrel 101 to rotate. At this time, the heated and incompletely heated coolants will separate. This is because the density of the coolant with a high temperature is lower than that of the coolant with a low temperature, and because the density is low The mass of the coolant is large, so it will move to the edge of the inner wall of the cooling cover barrel 101 under the action of centrifugal force. At this time, the coolant with high temperature will gather at the axis of the cooling cover barrel 101, and then transfer the temperature to the rotating dial plate 102, the heat absorbing plate 103, and then to the spiral blade 112. Since the rotation speed of the spiral blade 112 is the same as the rotation speed of the temperature conducting plate 104, the spiral blade 112 will quickly drive the external cold air to pass through the spiral blade 112, thereby improving the heat dissipation efficiency of the spiral blade 112, so as to improve the temperature difference of heat dissipation, thereby improving the heat conduction speed. At the same time, the temperature of the coolant will also be transferred to the cooling cover barrel 101, and then transferred to the heat absorbing sleeve 119 set on the outer surface of the cooling cover barrel 101, and then transferred to the tail heat sink 117 through the connection of the temperature conducting block 116. Since the tail heat sink 117 is set in the exhaust port 121, the air flowing in the air guide cover 115 will also dissipate heat to the tail heat sink 117.

[0034] Assume R, L, C are the equivalent resistance, equivalent inductance and capacitance of the inverter load, V d is the inverter input voltage, Q is the quality factor of the load, ; according to Figure 1 The power analysis of the circuit output is: in: = f s / f 0 , f 0 is the resonant frequency, It represents the output power when the switching frequency multiple relationship of the two bridge arm switches is n and the switching frequency of the bridge arm 1 switch is fs. When n=1 and f s = f 0 When , the maximum output power is: Figure 2 As shown; Assume the normalized output power (ratio of output power to maximum output power) is: Figure 3 As shown; like Figure 3 It can be obtained that when n=1, when n=2, and when n=inf, the normalized output power of the inverter is: Figure 4 , Figure 5 , Figure 6 ; From the above analysis, it can be concluded that the maximum output power (in resonant state) of the inverter in the corresponding working modes when n=1, n=2, n=3 and n=∞ are: Figure 7 As shown; like Figure 7 The output curves of the relationship between output power and switching frequency can be obtained in various power ranges, such as Fig. 9 As shown, there is a lower power output near Wn, that is, near the resonance point, which means that for loads of different power ranges, the corresponding power can be output near the resonance point. Since the reactive power is small near the resonance point, the efficiency is high. The circuit can be operated in different working modes and output different powers by controlling the switching frequency multiple relationship n of the two bridge arm switches. For motor loads of different power sizes, the DSP controller identifies the load type and sends corresponding on and off drive pulses to the switch tube according to the load power type. For pulses of different power types, the switching frequency multiple relationship n of the two switch tubes is different, so that the inverter outputs different currents, thereby outputting corresponding power, and can ensure that the driver has greater efficiency in each power range.

Claims

1. A control system for matching motor drivers with multiple power loads, characterized in that: It includes a full-bridge inverter, a DSP controller, a power module, and a load motor; the power module is connected to the full-bridge inverter to provide direct current to the full-bridge inverter, the DSP controller is connected to the full-bridge inverter to provide four-way pulse signals to control the output of the full-bridge inverter, and the load motor is connected to the full-bridge inverter to drive the load motor to move; The DSP controller sends four pulse signals to the two switch devices on the two bridge arms of the full-bridge inverter according to the identified load motor type. By controlling the on and off timing of the four switches in the two bridge arms, the inverter outputs the corresponding current and the inverter outputs the corresponding power to match the corresponding load.

2. A control system for matching motor drivers with multiple power loads according to claim 1, characterized in that: The full-bridge inverter, the DSP controller, and the power module are all mounted on the mounting plate (120), and the full-bridge inverter, the DSP controller, the power module, and the load motor are all arranged inside the cooling hood barrel (101). The cooling hood barrel (101) is mounted on the mounting plate (120), and the bottom of the cooling hood barrel (101) and the mounting plate (120) are connected by a sealant.

3. A control system for matching motor drivers with multiple power loads according to claim 2, characterized in that: A plurality of flow dividing ring plates (106) are fixed along the axial direction on the inner wall of the cooling hood barrel (101), and each flow dividing ring plate (106) is provided with a plurality of capillary holes; a sealing cover plate (107) is fixedly and sealedly installed on the top of the cooling hood barrel (101), a temperature conducting plate (104) is rotatably installed on the lower surface of the sealing cover plate (107), and a plurality of rotating dial plates (102) arranged in a circular array are fixed on the lower surface of the temperature conducting plate (104), and the rotation center of the rotating dial plate (102) is coaxially arranged with the cooling hood barrel (101).

4. A control system for matching motor drivers with multiple power loads according to claim 3, characterized in that: A temperature conducting column (105) fixed to the temperature conducting disk (104) is also provided at the rotation center of all the rotating dial plates (102), and a plurality of heat absorbing disks (103) are fixedly arranged at equal intervals along the axial direction on the outer surface of the temperature conducting column (105).

5. A control system for matching motor drivers with multiple power loads according to claim 4, characterized in that: The temperature conducting column (105) extends to the top of the sealing cover plate (107), and the temperature conducting column (105) and the sealing cover plate (107) are connected in a rotating sealed manner. A driven rotating disk (109) fixed to the temperature conducting column (105) is rotatably mounted on the upper surface of the sealing cover plate (107).

6. A control system for matching motor drivers with multiple power loads according to claim 5, characterized in that: A driving motor (114) is fixedly mounted on the outer surface of the cooling hood barrel (101), a driving pulley (110) is fixed on the output shaft of the driving motor (114), and the driving pulley (110) is connected to the driven rotating disk (109) via a transmission belt (108).

7. A control system for matching motor drivers with multiple power loads according to claim 6, characterized in that: A heat sink (111) is fixedly mounted on the driven rotating disk (109); a plurality of spiral blades (112) arranged in a circular array are fixedly mounted on the upper surface of the heat sink (111); the spiral blades (112) and the heat sink (111) are integrally formed; the interiors of the heat sink (111) and the spiral blades (112) are hollow; the hollow spaces inside the heat sink (111) and the spiral blades (112) are connected; and electronic fluoride liquid is arranged inside the heat sink (111).

8. The control system for matching motor drivers with multiple power loads according to claim 7, characterized in that: A cover plate (113) is fixedly buckled on the sealing cover plate (107), the cover plate (113) is rotatably matched with the heat dissipation plate (111), an air guide cover (115) is fixed on the cover plate (113), an air inlet (118) and an air outlet (121) are provided on the air guide cover (115), the air inlet (118) and the heat dissipation plate (111) are coaxially arranged, and the air guide cover (115) is buckled on the outer side of the spiral blade (112).

9. A control system for matching motor drivers with multiple power loads according to claim 8, characterized in that: A heat absorbing sleeve (119) is fixedly provided on the outer surface of the cooling hood barrel (101); a connecting temperature conducting block (116) is provided on the outer surface of the heat absorbing sleeve (119); a tail heat sink (117) is fixedly provided on the connecting temperature conducting block (116); and the tail heat sink (117) is located in the exhaust port (121).

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