TWI604684B - Synchronous rectifier alternator and protection method thereof - Google Patents

Description

Synchronous rectifier generator and protection method thereof

The present invention relates to a generator circuit, and more particularly to a method of protecting a synchronous rectification generator and a rectifier circuit.

The conventional automotive alternator is composed of a rotor coil and a stator coil. When the exciting current passes through the rotor coil, the rotor coil can provide a magnetic field to the stator coil. When the internal combustion engine of the automobile drives the rotor coil to rotate, the rotor coil generates a rotating magnetic field, so that the stator coil generates alternating current energy. The rectifier receives AC power from the alternator and rectifies it to produce DC power. This DC power can charge the battery. This battery can provide excitation current to the rotor coil.

In general, the large amount of current flowing through the rectifier increases the temperature of the rectifier. When the operating temperature of the rectifier is too high, the rectifier will be damaged due to high temperatures.

The invention provides a synchronous rectification generator and a protection method thereof, which can protect the rectifier circuit in time when an abnormal event occurs in the rectifier circuit to prevent the rectifier circuit from being damaged due to the occurrence of an abnormal event.

Embodiments of the present invention provide a synchronous rectification generator. The synchronous rectification generator includes an alternator, a rectifier circuit, a regulator circuit, and a controller circuit. The alternator has a field coil and a power generating coil portion for converting mechanical energy into alternating current energy. The rectifier circuit is electrically connected to the power generating coil portion. The rectifier circuit is used to convert AC power into DC power. The regulator circuit is electrically coupled to the rectifier circuit to detect DC power. The regulator circuit is electrically coupled to the field coil to adjust the current of the field coil. The controller circuit is electrically coupled to the rectifier circuit and the regulator circuit for controlling the rectification operation of the rectifier circuit and detecting whether an abnormal event has occurred in the rectifier circuit. When an abnormal event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil.

Embodiments of the present invention provide a method of protecting a synchronous rectification generator. The synchronous rectification generator includes a rectifier circuit, a regulator circuit, a controller circuit, and a field coil. The protection method includes: detecting whether an abnormal event occurs in the rectifier circuit; and when an abnormal event occurs in the rectifier circuit, the controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil.

Based on the above, an embodiment of the present invention provides a method for protecting a synchronous rectification generator and a rectifier circuit. When an abnormal event occurs in the rectifier circuit, the regulator circuit can adjust the current supplied to the field coil (for example, reducing the current of the field coil or stopping supplying current to the field coil). Since the current of the field coil is turned down (or even without current), the AC power of the power generating coil portion is also turned down (or even zero), so that the alternator can stop generating electricity. Therefore, when an abnormal event occurs in the rectifier circuit, the circuit provided by the embodiment of the present invention can protect the rectifier circuit in real time.

The above described features and advantages of the invention will be apparent from the following description.

The term "coupled (or connected)" as used throughout the specification (including the scope of the claims) may be used in any direct or indirect connection. For example, if the first device is described as being coupled (or connected) to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be A connection means is indirectly connected to the second device. In addition, wherever possible, the elements and/ Elements/components/steps that use the same reference numbers or use the same terms in different embodiments may refer to the related description.

FIG. 1 is a circuit block diagram of a synchronous rectification generator 100 according to an embodiment of the invention. The synchronous rectification generator 100 can generate DC power according to the control of an Electronic Control Unit (ECU) 10. This DC power can be stored in the battery 20. According to design requirements, the DC power generated by the synchronous rectifier generator 100 can also be supplied to one or more load circuits (not shown). In the embodiment shown in FIG. 1, the synchronous rectification generator 100 includes a rectifier circuit 110, an alternator 120, a regulator circuit 130, and a controller circuit 140. Controller circuit 140 is electrically coupled to rectifier circuit 110 and regulator circuit 130. The controller circuit 140 can control the rectifying operation of the rectifier circuit 110. In some application scenarios, regulator circuit 130 and controller circuit 140 may be referred to as a rotor controller and a stator controller, respectively.

FIG. 2 is a schematic flow chart of a method for protecting a synchronous rectification generator according to an embodiment of the invention. Referring to Figures 1 and 2, the alternator 120 converts mechanical energy into alternating current energy. The alternator 120 has a field coil 121 and a power generating coil portion 122. When the current passes through the field coil 121, the field coil 121 can supply a magnetic field to the power generating coil portion 122. One of the field coil 121 and the power generating coil portion 122 is a rotor coil, and the other of the field coil 121 and the power generating coil portion 122 is a stator coil. For example, but not limited to, the field coil 121 may be a rotor coil and the power generating coil portion 122 may be a stator coil. When the mechanical energy drives one of the field coil 121 and the power generating coil portion 122 to rotate, the power generating coil portion 122 can generate alternating current power to the rectifier circuit 110. Therefore, the alternator 120 can convert mechanical energy into alternating current energy. The rectifier circuit 110 is electrically connected to the power generating coil portion 122. The rectifier circuit 110 converts AC power from the power generating coil portion 122 into DC power and supplies the DC power to the battery 20.

The regulator circuit 130 is electrically connected to the power generating coil portion 122 to detect the phase signal PS generated by the operation of the alternator 120. Regulator circuit 130 is electrically coupled to rectifier circuit 110 to detect DC power. The regulator circuit 130 is electrically coupled to the field coil 121. In step S230, the regulator circuit 130 can use the DC power of the battery 20 to supply current to the field coil 121. The regulator circuit 130 can adjust the current of the field coil 121 in step S230 according to the phase signal PS and the DC power output by the rectifier circuit 110. The current of the field coil 121 can affect the alternating current power generated by the power generating coil portion 122.

In an embodiment of the invention, the rectifier circuit 110 will be detected whether an abnormal event has occurred (step S240), which may include, for example, an over-temperature event, an over-current event, or an over-voltage (over) -voltage) event). In step S250, when an abnormal event occurs in the rectifier circuit 110, the regulator circuit 130 adjusts the current of the field coil 121, for example, reduces the current of the field coil 121, or stops supplying current to the field coil 121. Since the current of the field coil 121 is reduced or even no current, the alternator 120 can be stopped to generate power, thereby preventing the rectifier circuit 110 from continuing to operate after an abnormal event.

FIG. 3 is a schematic flow chart of a method for protecting a synchronous rectification generator according to another embodiment of the invention. The steps S230 and S240 shown in FIG. 3 can be referred to the related descriptions of steps S230 and S240 shown in FIG. 2, and thus will not be described again. Referring to FIGS. 1 and 3, the controller circuit 140 can detect whether an abnormal event has occurred in the rectifier circuit 110 (step S240). When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 immediately notifies/controls the regulator circuit 130 to cause the regulator circuit 130 to reduce or stop supplying current to the field coil 121. In the embodiment shown in FIG. 1, the detection and notification of an abnormal event occurring in the rectifier circuit 110 can be performed, for example, by the controller circuit 140, but is not limited thereto. In other embodiments, the detection and notification function of the abnormal event may actually be implemented in any of the circuit architectures of the synchronous rectification generator 100. For example, the detection and notification function of the abnormal event is configured to electrically connect any circuit unit of the rectifier circuit 110 and the regulator circuit 130 to notify the regulator circuit 130 to reduce or stop when an abnormal event occurs in the rectifier circuit 110 is detected. A current is supplied to the field coil 121.

The manner in which the regulator circuit 130 stops supplying the field coil current may include, for example, stopping the supply of current to the field coil 121 by turning off a switch (not shown) between the regulator circuit 130 and the field coil 121. In addition, the present invention further proposes a technical solution for reducing or stopping the supply of current to the field coil 121 by means of the controller circuit 140 interfering with the phase signal PS generated by the operation of the alternator 120, as described in detail below.

Referring to FIG. 1 and FIG. 3, the controller circuit 140 may determine whether to interfere with the phase signal PS according to whether the rectifier circuit 110 has an abnormal event. When it is determined in step S240 that the rectifier circuit 110 has an abnormal event, the controller circuit 140 immediately proceeds to step S450. In step S450, the controller circuit 140 may interfer in time with the phase signal PS to cause the regulator circuit 130 to reduce or stop supplying current to the field coil 121. For example, but not limited to, controller circuit 140 may pull phase signal PS down to a predetermined range to cause regulator circuit 130 to reduce or stop supplying current to field coil 121.

FIG. 4 is a schematic flow chart of a method for protecting a synchronous rectification generator according to still another embodiment of the present invention. Referring to FIGS. 1 and 4, the controller circuit 140 is electrically coupled to the rectifier circuit 110 and the regulator circuit 130. In step S510, the controller circuit 140 can control the rectification operation of the rectifier circuit 110. At step S520, the controller circuit 140 can detect whether an abnormal event has occurred in the rectifier circuit 110. According to design requirements, the abnormal events may include, for example, an over-temperature event, an over-current event, or an over-voltage event. Depending on whether the rectifier circuit 110 has an abnormal event, the controller circuit 140 may determine whether to interfere with the phase signal PS in step S520.

When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 immediately interferes with the phase signal PS (step S530). Since the phase signal PS is interfered (e.g., the phase signal PS is pulled low), the regulator circuit 130 correspondingly reduces or stops the supply of current to the field coil 121 (step S540). For example, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may correspondingly pull down the voltage level of the phase signal PS to a preset range, so that the regulator circuit 130 stops (or reduces) the supply current to the field coil. 121. The preset range can be determined according to design requirements. For example, the preset range may be "less than 1 volt" or "ground voltage level". The field coil 121 current can affect the AC power generated by the power generating coil portion 122. Therefore, by interfering with the phase signal PS, the alternating current power transmitted from the power generating coil portion 122 to the rectifier circuit 110 can be immediately turned down (even to zero).

The controller circuit 140 may check again whether the rectifier circuit 110 has an abnormal event in step S550. When the abnormal event has not been released, the controller circuit 140 repeats step S530, step S540, and step S550. When the rectifier circuit 110 does not have an abnormal event (for example, the temperature falls within the rated range), the controller circuit 140 does not interfere with the phase signal PS (step S560). Therefore, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 can immediately prevent damage of the rectifier circuit 110.

FIG. 5 is a schematic diagram showing an example circuit of the synchronous rectification generator 100 of FIG. 1 according to an embodiment of the invention. The embodiment shown in Fig. 5 can be used as a vehicle alternator and its regulating circuit. As shown in FIG. 5, the alternator 120 includes a rotor coil (e.g., field coil 121) and a stator coil (e.g., the power generating coil portion 122). In the embodiment shown in FIG. 5, the power generating coil portion 122 includes a U-phase coil 122U, a V-phase coil 122V, and a W-phase coil 122W. The first end and the second end of the U-phase coil 122U are electrically connected to the first common node 123 and the U-phase AC terminal 111U of the rectifier circuit 110, respectively. The first and second ends of the V-phase coil 122V are electrically coupled to the first common node 123 and the V-phase AC terminal 111V of the rectifier circuit 110, respectively. The first end and the second end of the W-phase coil 122W are electrically connected to the first common node 123 and the W-phase AC terminal 111W of the rectifier circuit 110, respectively. When the current passes through the field coil 121, and when the internal combustion engine (not shown) of the automobile drives the field coil 121 to rotate, the field coil 121 generates a rotating magnetic field. The U-phase coil 122U, the V-phase coil 122V and the W-phase coil 122W will cut the magnetic lines of the rotating magnetic field, thereby generating three-phase AC power to the U-phase AC terminal 111U of the rectifier circuit 110, the V-phase AC terminal 111V and the W-phase AC terminal. 111W.

The rectifier circuit 110 receives three-phase AC power from the alternator 120. The rectifier circuit 110 converts the three-phase AC power from the power generating coil portion 122 into DC power, and supplies the DC power to the second DC voltage output terminal (eg, the ground terminal GND) and the second DC voltage output terminal (eg, the power terminal B+). Give battery 20. It should be noted that the battery 20 can also supply DC power to the regulator circuit 130 via the power terminal B+ and the ground terminal GND.

In the embodiment shown in FIG. 5, the rectifier circuit 110 includes a U-phase upper switch 112UU, a U-phase lower switch 112LU, a V-phase upper switch 112UV, a V-phase lower switch 112LV, a W-phase upper switch 112UW, and a W-phase lower switch 112LW. The U-phase upper switch 112UU, the V-phase upper switch 112UV and the W-phase upper switch 112UW are electrically coupled to the second DC voltage output terminal (eg, power terminal B+) of the synchronous rectification generator 100. The U-phase lower switch 112LU, the V-phase lower switch 112LV, and the W-phase lower switch 112LW are electrically coupled to the first DC voltage output terminal (eg, the ground terminal GND) of the synchronous rectification generator 100. The U-phase upper switch 112UU is electrically coupled to the U-phase AC terminal 111U of the rectifier circuit 110 in common with the second end of the U-phase lower switch 112LU. The V-phase upper switch 112UV and the second end of the V-phase lower switch 112LV are electrically coupled to the V-phase AC terminal 111V of the rectifier circuit 110. The W-phase upper switch 112UW is electrically coupled to the W-phase AC terminal 111W of the rectifier circuit 110 in common with the second end of the W-phase lower switch 112LW. The controller circuit 140 can control the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, the W-phase upper switch 112UW, and the W-phase lower switch 112LW to control the rectification operation of the rectifier circuit 110. .

In the embodiment shown in FIG. 5, the regulator circuit 130 includes a switch 131, a diode 132, and a regulator control circuit 133. The first end of the switch 131 is electrically coupled to the first DC voltage output of the synchronous rectification generator 100 (eg, ground GND), and the second end of the switch 131 is electrically coupled to the first end of the field coil 121. The anode of the diode 132 is coupled to the first end of the field coil 121 and the second end of the switch 131, and the cathode of the diode 132 is electrically coupled to the second end of the field coil 121. The regulator control circuit 133 is electrically connected to the first DC voltage output terminal (for example, the ground terminal GND) of the synchronous rectification generator 100 and the second DC voltage output terminal (for example, the power terminal B+) to detect the output of the synchronous rectification generator 100. The voltage level of DC power. The regulator control circuit 133 is also electrically connected to the power generating coil portion 122 to detect the phase signal PS. The phase signal PS may be derived from any one of the stator coil U-phase coil, the V-phase coil, or the W-phase coil. In the present embodiment, the W-phase coil is taken as an example. The regulator control circuit 133 can correspond to the conduction state of the switch 131 according to the phase signal PS and the voltage level of the DC power output by the synchronous rectification generator 100 (for example, the voltage level of the power terminal B+). The conduction state of the switch 131 can determine the amount of current passing through the field coil 121, thereby adjusting the AC power generated by the power generating coil portion 122. Further, the regulator control circuit 133 can also receive a control command of the electronic control unit 10 via the control terminal LIN of the synchronous rectification generator 100. The regulator control circuit 133 can generate corresponding DC power according to the control of the electronic control unit 10. The implementation details of the regulator control circuit 133 can be determined in accordance with design requirements. For example, in some embodiments, conventional regulator control circuits or other control circuits may be employed to implement the regulator control circuit 133, and the operational details of the regulator control circuit 133 are not described again.

In addition to this, the controller circuit 140 can also detect whether an abnormal event has occurred in the rectifier circuit 110. For example, but not limited to, one or more temperature sensors (not shown) may be configured on the U-phase switch 112UU, the U-phase down switch 112LU, and the V-phase switch 112UV, V according to design requirements. The vicinity of one or more of the phase switch 112LV, the W phase upper switch 112UW, and the W phase lower switch 112LW. Implementation details of the one or more temperature sensors (not shown) may be determined in accordance with design requirements. For example, in some embodiments, a conventional temperature sensor or other temperature sensor may be employed to implement the one or more temperature sensors (not shown), and thus will not be described again. The controller circuit 140 can detect the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, and the W phase via the one or more temperature sensors (not shown). Whether an overtemperature event (abnormal event) occurs in one or more of the switch 112UW and the W phase down switch 112LW.

In other embodiments, one or more current sensors (not shown) may be configured on the U-phase switch 112UU, the U-phase switch 112LU, the V-phase switch 112UV, the V-phase switch 112LV, and the W phase. The current path of one or more of the upper switch 112UW and the W phase down switch 112LW. Implementation details of the one or more current sensors (not shown) may be determined in accordance with design requirements. For example, in some embodiments, a conventional current sensor or other current sensor may be employed to implement the one or more current sensors (not shown), and thus will not be described again. The controller circuit 140 can detect the U-phase upper switch 112UU, the U-phase lower switch 112LU, the V-phase upper switch 112UV, the V-phase lower switch 112LV, and the W phase via the one or more current sensors (not shown). Whether an overcurrent event (abnormal event) occurs in one or more of the switch 112UW and the W phase down switch 112LW.

In an embodiment, controller circuit 140 is electrically coupled to regulator circuit 130. When the rectifier circuit 110 does not have an abnormal event, the controller circuit 140 does not perform any abnormality notification action. Therefore, the regulator control circuit 133 is normally operated. When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may notify the regulator circuit 130 to cause the regulator control circuit 133 to control the switch 131 to reduce or stop the supply of current to the field coil 121, so that the power generating coil portion 122 is transferred to the rectifier circuit. The AC power of 110 can be turned down (or even zero) in real time.

In another embodiment, the controller circuit 140 can interfere with the phase signal PS in real time, for example, when an abnormal event occurs in the rectifier circuit 110. For example, but not limited to, the power generating coil portion 122 may include a first end outputting the phase signal PS, the regulator circuit 130 includes a second end receiving the phase signal PS, and the controller circuit 140 may be electrically Connected to the first end or the second end, or electrically connected to any node between the first end and the second end, to interfere with the phase signal PS when the abnormality event occurs in the rectifier circuit 110. When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 can pull down the phase signal PS to a preset range by setting a resistor (not shown). The preset range can be determined according to design requirements. For example, the preset range may be "less than 1 volt" or "ground voltage level". When the voltage level of the phase signal PS falls within the preset range, the regulator control circuit 133 stops supplying current to the field coil 121 by turning off the switch 131. Since the regulator circuit 130 stops supplying current to the field coil 121, the alternating current power that the power generating coil portion 122 transmits to the rectifier circuit 110 can be immediately turned down (even to zero). Therefore, when an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 can immediately prevent damage of the rectifier circuit 110.

Depending on the design requirements, the mechanism by which the controller circuit 140 returns from the "interference phase signal PS" to the "non-interference phase signal PS" can be implemented in several different ways. For convenience of explanation, it will be assumed herein that the abnormal event of the rectifier circuit 110 includes an over temperature event. The processing methods of other abnormal events can be referred to the relevant description of the over-temperature event, and therefore will not be described again.

For example, in some embodiments, when the temperature of the rectifier circuit 110 is between a first critical temperature and a second critical temperature (eg, between 180 degrees Celsius and 200 degrees Celsius), the controller circuit 140 correspondingly The phase signal PS is pulled down and held in a predetermined range for a predetermined period (eg, the phase signal PS is pulled down to the ground voltage level for 5 seconds) to cause the regulator circuit 130 to be in this preset period (eg, The supply of current to the field coil 121 is stopped within 5 seconds. After the end of this preset period, the controller circuit 140 can stop the interference phase signal PS, and thus the regulator circuit 130 can resume normal operation.

In other embodiments, when the temperature of the rectifier circuit 110 is greater than the first critical temperature and the second critical temperature (eg, greater than 215 degrees Celsius, plus or minus 30 degrees), the controller circuit 140 may be permanently The phase signal PS is maintained at the predetermined range (eg, maintained at a ground voltage level).

In still other embodiments, when the temperature of the rectifier circuit 110 is between the first critical temperature and the second critical temperature, the controller circuit 140 correspondingly pulls the phase signal PS down to a predetermined range and Hold for a preset period. After the end of this preset period, the controller circuit 140 can stop the interference phase signal PS, and thus the regulator circuit 130 can resume normal operation. In the case where the factor causing the abnormal event has not been eliminated, after the regulator circuit 130 resumes normal operation, the temperature of the rectifier circuit 110 is likely to rise abnormally again, thereby causing the controller circuit 140 to interfere with the phase signal PS again. The controller circuit 140 can count the number of interferences of the "controller circuit 140 interference phase signal PS". When the number of interferences is greater than a certain critical number, the controller circuit 140 can permanently maintain the phase signal PS within a predetermined range (eg, at a ground voltage level). The critical number can be determined according to design requirements, for example, the critical number is set to 10 times.

The embodiment shown in Figure 5 is an illustrative example of the operation of a three-phase alternator. According to design requirements, the present invention can also be applied to other types of automotive alternators, such as six-phase alternators or other multi-phase alternators of three or more phases.

It should be noted that in different application scenarios, the relevant functions of the regulator control circuit 133 and/or the controller circuit 140 may utilize a general hardware description language (such as Verilog HDL or VHDL) or other suitable The programming language is implemented as firmware or hardware. The firmware that can perform the related functions can be arranged as any known computer-accessible media, such as magnetic tapes, semiconductors, magnetic disks, or optical disks. (compact disks, such as CD-ROM or DVD-ROM), or the firmware can be transmitted over the Internet, wired communication, wireless communication, or other communication medium. The firmware can be stored in an accessible medium of the computer. Additionally, the apparatus and method of the present invention can be implemented by a combination of hardware and software.

In summary, the synchronous rectification generator 100 and the protection method thereof provided by the embodiments of the present invention can detect whether an abnormal event occurs in the rectifier circuit 110. When an abnormal event occurs in the rectifier circuit 110, the controller circuit 140 may cause the regulator circuit 130 to adjust the current of the field coil 121 (for example, reduce the current of the field coil 121 or stop supplying current to the field coil 121). Since the current of the field coil 121 is turned down (or even without current), the AC power of the power generating coil portion 122 is also turned down (or even zero). Therefore, when an abnormal event occurs in the rectifier circuit 110, the circuit provided by the embodiment of the present invention can protect the rectifier circuit 110 in real time.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Electronic Control Unit (ECU)
20‧‧‧Battery
100‧‧‧Synchronous rectifier generator
110‧‧‧Rectifier circuit
111U‧‧‧U phase AC
111V‧‧‧V phase AC
111W‧‧‧W phase AC
112UU‧‧‧U phase switch
112LU‧‧‧U phase down switch
112UV‧‧V phase switch
112LV‧‧‧V phase down switch
112UW‧‧‧W phase switch
112LW‧‧‧W phase down switch
120‧‧‧Alternator
121‧‧‧ field coil
122‧‧‧Power Generation Coil
122U‧‧‧U phase coil
122V‧‧‧V phase coil
122W‧‧‧W phase coil
123‧‧‧First common node
130‧‧‧Regulator circuit
131‧‧‧ switch
132‧‧‧ diode
133‧‧‧Regulator control circuit
140‧‧‧Controller Circuit
B+‧‧‧ power end
GND‧‧‧ ground terminal
LIN‧‧‧ control terminal
PS‧‧‧ phase signal
S230～S250, S450, S510～S560‧‧‧ steps

FIG. 1 is a circuit block diagram of a synchronous rectification generator according to an embodiment of the invention. FIG. 2 is a schematic flow chart of a method for protecting a synchronous rectification generator according to an embodiment of the invention. FIG. 3 is a schematic flow chart of a method for protecting a synchronous rectification generator according to another embodiment of the invention. FIG. 4 is a schematic flow chart of a method for protecting a synchronous rectification generator according to still another embodiment of the present invention. FIG. 5 is a schematic diagram showing an example circuit of the synchronous rectification generator of FIG. 1 according to an embodiment of the invention.

10‧‧‧Electronic Control Unit (ECU)

20‧‧‧Battery

100‧‧‧Synchronous rectifier generator

110‧‧‧Rectifier circuit

120‧‧‧Alternator

121‧‧‧ field coil

122‧‧‧Power Generation Coil

130‧‧‧Regulator circuit

140‧‧‧Controller Circuit

PS‧‧‧ phase signal

Claims (12)

A synchronous rectification generator comprising: an alternator having a field coil and a power generating coil portion for converting a mechanical energy into an alternating current electrical energy; a rectifier circuit electrically connected to the power generating coil portion for Converting AC power to DC power; a regulator circuit electrically coupled to the rectifier circuit to detect the DC power and electrically coupled to the field coil to adjust current of the field coil; and a controller circuit electrically coupled to the a rectifier circuit and the regulator circuit for controlling a rectification operation of the rectifier circuit and detecting whether an abnormal event occurs in the rectifier circuit, wherein when the abnormality event occurs in the rectifier circuit, the controller circuit reduces the regulator circuit or Stop supplying current to the field coil. The synchronous rectification generator of claim 1, wherein the abnormal event comprises an over temperature event, an over current event or an over voltage event, and the synchronous rectification generator is a multiphase alternator. The synchronous rectification generator according to claim 1, wherein the controller circuit causes the regulator circuit to turn off a switch between the regulator circuit and the field coil when the abnormality occurs in the rectifier circuit The switch stops supplying current to the field coil. The synchronous rectifier generator according to claim 1, wherein: the field coil is a rotor coil, and the power generating coil portion includes a plurality of stator coils, and the alternator generates a phase signal when the motor is in operation, wherein the phase signal is from And any one of the plurality of stator coils, and the power generating coil portion includes a first end that outputs the phase signal; the regulator circuit is electrically connected to the power generating coil portion to detect the phase signal, wherein the regulator The circuit includes a second end receiving the phase signal, and the regulator circuit adjusts a current supplied to the field coil corresponding to the DC power according to the phase signal; and the controller circuit is electrically connected to the first end or the The second end, or any node between the first end and the second end, interferes with the phase signal when the abnormality event occurs in the rectifier circuit. The synchronous rectification generator of claim 4, wherein the controller circuit has a resistance between the first end or the second end or the any one of the nodes, and the abnormality occurs when the rectifier circuit In the event of an event, the controller circuit correspondingly pulls down the voltage level of the phase signal to a predetermined range. The synchronous rectifier generator according to claim 5, wherein the abnormal event comprises an over temperature event, wherein: when the temperature of the rectifier circuit is between a first critical temperature and a second critical temperature, The controller circuit correspondingly holds the phase signal in the preset range for a predetermined period of time, so that the regulator circuit reduces or stops supplying current to the field coil during the preset period, and ends in the preset period Thereafter, the controller circuit stops interfering with the phase signal; and when the temperature of the rectifier circuit is greater than the first critical temperature and the second critical temperature, the controller circuit permanently maintains the phase signal at the preset range . A method for protecting a synchronous rectification generator, the synchronous rectification generator comprising a rectifier circuit, a regulator circuit, a controller circuit and a field coil, the method comprising: detecting whether an abnormal event occurs in the rectifier circuit; and when the rectifier The controller circuit causes the regulator circuit to reduce or stop supplying current to the field coil when the abnormal event occurs in the circuit. The method of claim 7, wherein the abnormal event comprises an over temperature event, an over current event, or an over voltage event. The method of claim 7, wherein the regulator circuit detects a phase signal generated by the operation of the synchronous rectifier generator to adjust a current supplied to the field coil according to the phase signal, wherein The step of causing the regulator circuit to reduce or stop supplying current to the field coil includes: the controller circuit correspondingly determining whether to interfere with the phase signal according to whether the rectifier circuit generates the abnormal event; and when the abnormality event occurs in the rectifier circuit The controller circuit pulls the phase signal down to a predetermined range to cause the regulator circuit to reduce or stop supplying current to the field coil. The method of claim 9, wherein when the abnormal event is an over-temperature event, the step of the controller circuit interfering with the phase signal comprises: when the temperature of the rectifier circuit is between a first threshold When the temperature is between a second critical temperature, the controller circuit correspondingly maintains the phase signal in the preset range for a predetermined period, so that the regulator circuit reduces or stops the supply current during the preset period. The field coil is given to the field coil, and after the predetermined period ends, the controller circuit stops interfering with the phase signal. The method of claim 10, wherein the step of interfering with the phase signal further comprises: permanently applying the phase when the temperature of the rectifier circuit is greater than the first critical temperature and the second critical temperature The signal remains in the preset range. The method of claim 10, wherein the step of interfering with the phase signal further comprises: counting an interference number of the controller circuit interfering with the phase signal; and when the number of interferences is greater than a critical number of times, permanent The phase signal is intentionally maintained in the preset range.