Improved motorcycle idling start-stop controller

Abstract

An improved motorcycle idling start-stop controller is composed of a power supply loop, a voltage stabilizing module LDO, a microprocessing module MCU, an upper tube MOS driving loop, a U-phase MOS upper tube, a V-phase MOS upper tube, a W-phase MOS upper tube, a lower tube MOS driving loop, a U-phase MOS lower tube, a V-phase MOS lower tube, a W-phase MOS lower tube, an ISG motor and a lower bridge zero crossing point detection loop. The power supply module is used for supplying power to the U-phase upper tube MOS driving circuit, the V-phase upper tube MOS driving circuit and the W-phase upper tube MOS driving circuit, respectively supplying power to the upper tube MOS driving circuit and the lower tube MOS driving circuit, and supplying power to the micro-processing module MCU through the voltage stabilizing module LDO, and the micro-processing module MCU controls the ISG motor to operate through the upper tube MOS driving circuit, the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS, and through the lower tube MOS driving circuit, the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS. And the lower bridge zero crossing point detection loop identifies and controls an MOS tube of the lower tube MOS driving loop to be switched on or switched off through the micro-processing module MCU according to the counter electromotive force phase voltage generated by the ISG motor, so that the ISG motor is controlled to operate normally.

Description

TECHNICAL FIELD

[0001] The utility model relates to motorcycle motor control, especially, relate to an improved motorcycle idle start-stop controller capable of preventing device heating due to motorcycle idle start-stop controller falling hall state. BACKGROUND

[0002] At present, the motorcycle idle start-stop controller on the market mainly adopts phase-shift voltage regulation, and the phase-shift voltage regulation relies on a hall signal to realize accurate motor control, thereby improving the performance and efficiency of the motorcycle. The applicant has also previously applied for a utility model patent - a circuit for realizing high and low side driving of MOS tubes by using a Sepic boost-buck circuit (patent application number CN202322420894.7), which includes an external power supply BATT, a switch IG_SW, a power supply VCC, a boost-buck circuit, a voltage stabilizing module LDO, a micro-processing module MCU, a ground terminal, three-phase MOS pairs of tubes (T1A, T1B, T1C), three-phase MOS upper tubes (T2A, T2B, T2C), three-phase MOS lower tubes (T3A, T3B, T3C), and an ISG motor.

[0003] However, when the motorcycle is in an abnormal state during riding, such as the disconnection of the two ends of the hall (the hall line on the motor is disconnected from the hall line of the idle start-stop controller or the hall fails, the motorcycle idle start-stop controller cannot receive the hall signal, enters short-circuit voltage regulation, and the motorcycle idle start-stop controller heats up quickly and has a high temperature. At this time, the high heat is caused by the back electromotive force generated by the ISG motor passing through the body diode inside the upper bridge MOS, flowing to BATT+, and then to BATT-. Subsequently, the body diode inside the lower bridge MOS, flows to the ISG motor. In this process, the flow through the body diode inside the upper and lower bridge MOSs causes the MOSs of the upper and lower bridges to heat up severely, thereby causing the motorcycle idle start-stop controller to heat up severely, which may result in the risk of vehicle loss of control. SUMMARY

[0004] In order to overcome the above-mentioned defects, the utility model provides an improved motorcycle idle start-stop controller capable of preventing falling hall state, which has simple design structure, low cost and greatly reduces the heat of the idle start-stop controller.

[0005] The utility model discloses a technical scheme is realized as follows: an improved motorcycle idle speed start-stop controller is composed of a power supply circuit, a voltage stabilizing module LDO, a micro-processing module MCU, an upper tube MOS drive circuit, a U-phase MOS upper tube, a V-phase MOS upper tube, a W-phase MOS upper tube, a lower tube MOS drive circuit, a U-phase MOS lower tube, a V-phase MOS lower tube, a W-phase MOS lower tube and an ISG motor, the power supply circuit is powered through a switch IG_SW and a VCC end by a positive electrode BATT+ of an external power supply, and the power supply circuit also powers the upper tube MOS drive circuit and the lower tube MOS drive circuit, the power supply circuit also powers the micro-processing module MCU through the voltage stabilizing module LDO, the micro-processing module MCU controls the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS through the upper tube MOS drive circuit, thereby controlling the ISG motor to operate, and the micro-processing module MCU also controls the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS through the lower tube MOS drive circuit, thereby controlling the ISG motor to operate, and the lower bridge zero-crossing detection circuit is also included, the lower bridge zero-crossing detection circuit accurately identifies the MOS tube conduction or shutdown of the lower tube MOS drive circuit according to the counter electromotive force phase voltage generated by the ISG motor through the micro-processing module MCU, thereby controlling the ISG motor to operate normally.

[0006] As a further improvement of the utility model, the G poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are respectively connected to the upper tube MOS drive circuit through resistors, the D poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are connected to the positive electrode BATT+ of the external power supply, the S poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are respectively connected to the D poles of the corresponding U-phase lower tube MOS, V-phase lower tube MOS and W-phase lower tube MOS and are also respectively connected to the corresponding phase voltage input ends of the ISG motor, and the G poles of the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS are respectively connected to the lower tube MOS drive circuit through resistors, and the S poles of the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS are connected to the negative electrode BATT- of the external power supply.

[0007] As a further improvement of the utility model, the lower bridge zero-crossing detection circuit has multiple comparators, the reverse input ends of each comparator are connected to a 5mV reference voltage, the forward input ends of each comparator are respectively connected to the corresponding phase voltage output ends through resistors and capacitors, and the output ends of each comparator are connected to the input ends of the micro-processing module MCU through pull-up resistors.

[0008] As a further improvement of the utility model, the lower bridge zero-crossing detection circuit is a four-way comparator LM339, three phase voltages ACGU, phase voltage ACGV and phase voltage ACGW of the ISG motor are respectively taken as the positive input end of the four-way comparator LM339, the four-way comparator LM339 outputs three groups of detection signals PWM, the micro processing module MCU accurately judges and identifies according to the three groups of detection signals PWM, and the turn-on and turn-off of the lower bridge MOS are controlled, thereby the normal operation of the ISG motor is controlled.

[0009] The utility model has the advantages of simple structure, low cost, greatly reduced heat of the idle speed start-stop controller and avoided vehicle out-of-control risk. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the control block diagram of the utility model;

[0011] Figure 2 It is the lower bridge zero-crossing detection circuit schematic diagram in the utility model;

[0012] Figure 3 It is the four-way comparator schematic diagram in the utility model;

[0013] Figure 4 It is the three-phase voltage signal (has hall signal) outputted by the ISG motor in the utility model;

[0014] Figure 5 It is the detection signal (no hall signal) outputted by the lower bridge zero-crossing detection circuit in the utility model. DETAILED DESCRIPTION

[0015] Combined Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the following is described in detail:

[0016] An improved motorcycle idle start-stop controller is composed of a power supply circuit, a voltage stabilizing module LDO, a micro-processing module MCU, an upper tube MOS drive circuit, a U-phase MOS upper tube, a V-phase MOS upper tube, a W-phase MOS upper tube, a lower tube MOS drive circuit, a U-phase MOS lower tube, a V-phase MOS lower tube, a W-phase MOS lower tube and an ISG motor, the power supply circuit is powered through an external power supply positive pole BATT+ via a switch IG_SW and a VCC terminal, and the power supply circuit supplies power to the upper tube MOS drive circuit and the lower tube MOS drive circuit, the power supply circuit also supplies power to the micro-processing module MCU through the voltage stabilizing module LDO, the G poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are connected to the upper tube MOS drive circuit via resistors respectively, the D poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are connected to the external power supply positive pole BATT+ respectively, the S poles of the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS are connected to the D poles of the corresponding U-phase lower tube MOS, V-phase lower tube MOS and W-phase lower tube MOS respectively, and are also connected to the corresponding phase voltage input terminals of the ISG motor, the G poles of the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS are connected to the lower tube MOS drive circuit via resistors respectively, and the S poles of the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS are connected to the external power supply negative pole BATT-, the micro-processing module MCU controls the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS through the upper tube MOS drive circuit, thereby controlling the operation of the ISG motor, and the micro-processing module MCU also controls the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS through the lower tube MOS drive circuit, thereby controlling the operation of the ISG motor,

[0017] The lower bridge zero-crossing detection circuit is a four-channel comparator LM339, three phase voltages ACGU, ACGV and ACGW of the ISG motor are respectively used as the forward input terminals of the four-channel comparator LM339, the reverse input terminals of each comparator are connected to a 5mV reference voltage, and the output terminals of each comparator are connected to the input terminals of the micro-processing module MCU through pull-up resistors, the four-channel comparator LM339 outputs three groups of detection signals PWM, the micro-processing module MCU accurately judges and identifies according to the three groups of detection signals PWM, controls the turn-on and turn-off of the lower bridge MOS, and thereby controls the normal operation of the ISG motor.

[0018] The four-channel comparator LM339 (as shown in Figure 3 ), has 14 pins in total, pins 1, 2, 13 and 14 are the output terminals of the LM339, pin 3 is the power supply terminal of the LM339, pin 12 is the ground terminal, pins 4, 6, 8 and 10 are the reverse input terminals of the LM339, and pins 5, 7, 9 and 11 are the forward input terminals of the LM339.

[0019] The lower bridge zero-crossing detection circuit composed of the four comparators LM339 is composed (as shown in Figure 2 ) In the figure, a 5V voltage is applied to the comparators LM339 to make them work normally; in addition, a 5V voltage is divided by two voltage dividing resistors to obtain a 5mV voltage, and the 5mV voltage is connected to the reverse input terminals (LM339 pins 4, 6, and 10) of the LM339 through resistors. The motorcycle idle start-stop controller directly drives the upper MOS and the lower MOS, thereby controlling the motorcycle starting and generating integrated machine (ISG motor for short), and ACGU, ACGV, and ACGW are the voltages of the S poles of the upper MOS and the D poles of the lower MOS of the U, V, and W phases, respectively. ACGU, ACGV, and ACGW are connected to the forward input terminals (LM339 pins 5, 7, and 11) of the LM339 through resistors and capacitors. The output terminals (LM339 pins 2, 1, and 13) of the LM339 output through pull-up resistors.

[0020] ( Figure 1 , Figure 2 )

[0021] The working process of the controller is as follows:

[0022] 1. When the motorcycle is normally ridden (the Hall is normally connected), the three Hall sensors in the motor can detect the back electromotive force generated by the motor to generate U, V, and W phase Hall signals (PWM signals) Figure 4 ), which are transmitted to the MCU of the motorcycle idle start-stop controller through a hardware circuit, and the MCU controls the MOS of the upper MOS and the lower MOS drive circuit to work normally, so that the motorcycle runs normally.

[0023] 2. When the Hall is abnormal (the Hall is detached or the Hall is invalid), the lower bridge zero-crossing detection circuit detects the back electromotive force generated by the ISG motor to output U, V, and W phase PWM signals (similar to the Hall signal when there is a Hall), as shown in Figure 5 , and then the U, V, and W phase PWM signals are transmitted to the MCU, which controls the opening and closing of the lower MOS, so that the motorcycle idle start-stop controller greatly reduces the heat generation.

[0024] At this time, the reason for the low heat generation is that the back electromotive force generated by the ISG motor flows through the body diode inside the upper bridge MOS, flows to BATT+, and then flows to BATT- through the lower bridge MOS (to avoid flowing through the body diode), and then flows to the ISG motor. Since the lower bridge zero-crossing detection circuit can identify the zero-crossing point of the back electromotive force, the MCU can accurately identify the motor position and control the opening and closing of the lower MOS, thereby reducing the heat generation, so that the heat generation of the idle start-stop controller is greatly reduced. (as shown in Figure 2 andFigure 3 ).

[0025] In this way, when the motorcycle occurs Hall anomaly, the Hall signal is simulated through the lower bridge zero-crossing detection circuit, so that the micro-processing module MCU accurately identifies and controls the opening and closing of the MOS, has the advantages of simple structure, low cost and greatly reduces the heat of the idle start-stop controller, avoids the risk of vehicle out of control.

Claims

1. An improved motorcycle idle start-stop controller, comprising a power supply circuit, a voltage stabilizing module LDO, a micro-processing module MCU, an upper tube MOS drive circuit, a U-phase MOS upper tube, a V-phase MOS upper tube, a W-phase MOS upper tube, a lower tube MOS drive circuit, a U-phase MOS lower tube, a V-phase MOS lower tube, a W-phase MOS lower tube and an ISG motor, wherein the power supply circuit is powered by an external power supply positive pole BATT+ through a switch IG_SW and a VCC terminal, and the power supply circuit supplies power to the upper tube MOS drive circuit and the lower tube MOS drive circuit respectively, the power supply circuit also supplies power to the micro-processing module MCU through the voltage stabilizing module LDO, the micro-processing module MCU controls the U-phase upper tube MOS, the V-phase upper tube MOS and the W-phase upper tube MOS through the upper tube MOS drive circuit, and controls the U-phase lower tube MOS, the V-phase lower tube MOS and the W-phase lower tube MOS through the lower tube MOS drive circuit, thereby controlling the operation of the ISG motor, characterized in that, The lower bridge zero-crossing detection circuit is used for accurately identifying the reverse electromotive force phase voltage generated by the ISG motor through the micro-processing module MCU, and controlling the MOS pipe conduction or shutdown of the lower pipe MOS drive circuit, so as to control the normal operation of the ISG motor.

2. The improved motorcycle idle start-stop controller of claim 1, wherein, The G poles of the U-phase upper MOS, the V-phase upper MOS and the W-phase upper MOS are connected to the upper MOS drive circuit through resistors, the D poles of the U-phase upper MOS, the V-phase upper MOS and the W-phase upper MOS are connected to the positive pole BATT+ of the external power supply, the S poles of the U-phase upper MOS, the V-phase upper MOS and the W-phase upper MOS are connected to the D poles of the corresponding U-phase lower MOS, V-phase lower MOS and W-phase lower MOS respectively, and are also connected to the corresponding phase voltage input end of the ISG motor, and the G poles of the U-phase lower MOS, the V-phase lower MOS and the W-phase lower MOS are connected to the lower MOS drive circuit through resistors, and the S poles of the U-phase lower MOS, the V-phase lower MOS and the W-phase lower MOS are connected to the negative pole BATT- of the external power supply.

3. The improved motorcycle idle start-stop controller of claim 1 or 2, wherein, The lower bridge zero-crossing detection circuit has multiple comparators, the reverse input end of each comparator is connected to a 5mV reference voltage, the forward input end of each comparator is connected to the corresponding phase voltage output end through a resistor and a capacitor, and the output end of each comparator is connected to the input end of the micro-processing module MCU through a pull-up resistor.

4. The improved motorcycle idle start-stop controller of claim 3, wherein, The lower bridge zero-crossing detection circuit is a four-channel comparator LM339, the three phase voltages ACGU, ACGV and ACGW of the ISG motor are used as the forward input ends of the four-channel comparator LM339, the four-channel comparator LM339 outputs three groups of detection signals PWM, the micro-processing module MCU accurately judges and identifies the three groups of detection signals PWM, controls the opening and closing of the lower bridge MOS, and thus controls the normal operation of the ISG motor.

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