CN102097894B - 一种交流发电机的发电方法及其发电机 - Google Patents

一种交流发电机的发电方法及其发电机 Download PDF

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CN102097894B
CN102097894B CN2011100331744A CN201110033174A CN102097894B CN 102097894 B CN102097894 B CN 102097894B CN 2011100331744 A CN2011100331744 A CN 2011100331744A CN 201110033174 A CN201110033174 A CN 201110033174A CN 102097894 B CN102097894 B CN 102097894B
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alternating current
generator
permanent magnet
electricity
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CN102097894A (zh
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陈维加
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NANTONG TIGER POWER MACHINE CO Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • H02K11/05—Rectifiers associated with casings, enclosures or brackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

本发明公开了一种交流发电机的发电方法及其发电机，其将两个可发出不同频率等幅交流电的多极永磁发电机的定子线圈以串联方式连接，使这两个多极永磁发电机发出的不同频率等幅交流电叠加产生一个幅度随两个等幅交流电电压差变化的具有包络线的调幅交流电，再将调幅交流电通过一个可控整流电路正反相整流，并滤波形成具有包络线频率的交流电输出。本发明方法可使交流发电机产生出波形失真度小，且不存在高频无线电电磁波干扰的正弦波输出电压。藉由该方法制造出的交流发电机，不但具有现有逆变发电机的所有优点，但制造成本大大低于现有逆变发电机，甚至低于目前一般通用发电机的制造成本，且不存在高频无线电电磁波，能够通过现有的欧洲 EMC 认证要求。

Description

一种交流发电机的发电方法及其发电机
技术领域
本发明涉及一种交流发电机的发电方法及其发电机。
背景技术
逆变发电机由于其体积小，重量轻，电性能好等诸多优点，近年来在小型引擎发电机领域发展很快。现有的逆变发电机的工作原理是采用一个多极的交流永磁发电机发出一个频率较高的等幅交流电，通过可控整流方法将该交流电整流成一个恒定的直流电，再通过逆变电路将其转换成所需要的交流电，俗称ADA方式。
由于现有的ADA逆变电路是通过桥式电路，采用IGBT功率晶体管对直流电斩波，再通过LC电路对该波形进行整形，还原成交流正弦波。因为采用IGBT功率晶体管在斩波频率20K的状态下工作会产生较大的开关损耗，造成晶体管的发热及功率的损失，降低了效率，同时用来对斩波后波形进行整形的大功率电感也会产生较大的热量，造成较大的损耗。同时20K斩波频率的多次谐波会产生可发射的高频无线电电磁波，如要将发电机功率做的更大，则无线电电磁波也更大，这将无法通过现有的欧洲EMC认证要求。
当然现有技术中亦有通过对较高频率等幅交流电直接用可控整流方法整流，同时控制其不同时间的导通角来获得接近正弦波波形的交流电，但波形失真度较大，而且在不同负载下失真度变化更大，从而无法满足许多用电器的要求。
从成本角度ADA逆变方式所使用的IGBT大功率晶体管，大容量电解电容，大功率电感的价格都较高，且IGBT晶体管规格随着电流的增大，价格成指数倍的增加，所以要制造5千瓦以上或更大功率的发电机成本将更高。所以目前逆变发电机还很难替代传统发电机。
发明内容
本发明目的是：提供一种交流发电机的发电方法，通过该方法可使交流发电机产生出波形失真度小，且不存在高频无线电电磁波干扰的正弦波输出电压。藉由该方法设计出的交流发电机不仅具有现有逆变发电机的所有优点，而且制造成本大大低于现有逆变发电机，甚至低于目前一般通用发电机的制造成本，同时不存在高频无线电电磁波，能够通过现有的欧洲EMC认证要求。
本发明的技术方案是：一种交流发电机的发电方法，将两个可发出不同频率等幅交流电的多极永磁发电机的定子线圈以串联方式连接，使得这两个多极永磁发电机发出的不同频率等幅交流电叠加产生一个幅度随两个等幅交流电电压差变化的具有包络线的调幅交流电，再将所述调幅交流电通过一个可控整流电路正反相整流，并滤波形成具有包络线频率的交流电输出。
本发明方法中，其中一个多极永磁发电机与另一个多极永磁电机的周波数差为两周时即产生两个周期变化的调幅叠加波形，所述两个周期变化的调幅叠加波形通过正反相整流并整形产生出一个完整的正弦波波形。
本发明方法中，可采用两个磁极数不同的多极永磁发电机同轴安装发出不同频率的等幅交流电。当然本发明方法中，也可采用两个转速不同而极数相同的多极永磁发电机发出不同频率的等幅交流电。
本发明方法中，所述可控整流电路优选可控硅整流电路，所述采用可控硅整流电路对调幅交流电进行正反相整流为行业公知技术，本发明中不对可控硅整流电路作具体限定。
本发明同时提供一种根据上述方法制成的交流发电机，其包括两个可发出不同频率等幅交流电的多极永磁发电机和一个可控整流电路和一个整形滤波电路，所述两个多极永磁发电机的定子线圈以串联方式连接，再与可控整流电路和整形滤波电路顺序相连接。
本发明的优点是：
本发明方法可使交流发电机产生出波形失真度小，且不存在高频无线电电磁波干扰的正弦波输出电压。藉由该方法制造出的交流发电机，其不但具有现有逆变发电机的所有优点，但制造成本大大低于现有逆变发电机，甚至低于目前一般通用发电机的制造成本，且不存在高频无线电电磁波，能够通过现有的欧洲EMC认证要求。
附图说明
下面结合附图及实施例对本发明作进一步描述：
图1为主多极永磁发电机输出交流电的高频正弦波形图；
图2为副多极永磁发电机输出交流电的高频正弦波形图；
图3为主、副多极永磁发电机输出交流电叠加后形成的电压波形图；
图4为对叠加产生的电压波形进行正反向整流处理后产生的电压波形图。
     图5为对经正反向整流处理后的电压波形进行整形滤波后产生的正弦波波形图；
     图6为本发明交流发电机的电路连接结构示意图。
具体实施方式
实施例1：本发明提供了一种交流发电机的发电方法，该方法首先需要准备主、副两个永磁多极发电机，这两个永磁多极发电机可发出不同频率的等幅交流电。本实施例中主、副永磁多极发电机均为10对S-N单极磁瓦，对应30极三相定子线圈的永磁多极发电机，但两个发电机的转轴相互独立、且转速不同，其中副永磁多极发电机的转速低于主永磁多极发电机。具体如图1所示，为主永磁多极发电机输出交流电的高频正弦波形图，而图2所示为副永磁多极发电机输出交流电的高频正弦波形图，其周波数比主永磁发电机周波数多两个波。将上述两个永磁多极发电机的定子线圈串联连接，使得两个不同频率的等幅交流电相叠加产生一个幅度随两个等幅交流电电压差变化的具有包络线的调幅交流电，该交流电压波形如图3所示，再通过可控硅整流电路对上述得到的调幅交流电进行正反相整流，形成具有包络线频率的交流电输出（该交流电压波形的包络线就是所需频率的正弦波），如图4所示；最后再对波形进行整形滤波得到所需频率的正弦波交流电，如图5所示。
如图6所示为依据上述方法设计的交流发电机，该交流发电机将两个永磁多极发电机的定子线圈串联连接，再与可控整流电路和整形滤波电路顺序相连接，其中的可控整流电路为可控硅整流电路。
实施例2：同实施例1相比，本实施例中主永磁多极发电机为12对S-N单极磁瓦，对应36极三相定子线圈的永磁多极发电机，而副永磁多极发电机为10对S-N单极磁瓦，对应30极三相定子线圈的永磁多极发电机；两个发电机连接在同一根转轴上，转速相同。依旧如图1所示，为主永磁多极发电机输出交流电的高频正弦波形图，而图2所示为副永磁多极发电机输出交流电的高频正弦波形图，其周波数比主永磁发电机周波数多两个波。将上述两个永磁多极发电机的定子线圈串联连接，使得两个不同频率的等幅交流电相叠加产生一个幅度随两个等幅交流电电压差变化的具有包络线的调幅交流电，该交流电压波形如图3所示，再通过可控硅整流电路对上述得到的调幅交流电进行正反相整流，形成具有包络线频率的交流电输出（该交流电压波形的包络线就是所需频率的正弦波），如图4所示；最后再对波形进行整形滤波得到所需频率的正弦波交流电，如图5所示。
本发明方法可使交流发电机产生出波形失真度小，且不存在高频无线电电磁波干扰的正弦波输出电压。藉由该方法制造出的交流发电机，其不但具有现有逆变发电机的所有优点，但制造成本大大低于现有逆变发电机，甚至低于目前一般通用发电机的制造成本，且不存在高频无线电电磁波，能够通过现有的欧洲EMC认证要求。

Claims (6)

1.一种交流发电机的发电方法，其特征在于将两个可发出不同频率等幅交流电的多极永磁发电机的定子线圈以串联方式连接，使得这两个多极永磁发电机发出的不同频率等幅交流电叠加产生一个幅度随两个等幅交流电电压差变化的具有包络线的调幅交流电，再将所述调幅交流电通过一个可控整流电路正反相整流，并滤波形成具有包络线频率的交流电输出。
2.根据权利要求1所述的一种交流发电机的发电方法，其特征在于其中一个多极永磁发电机与另一个多极永磁发电机的周波数差为两周时，即产生两个周期变化的调幅叠加波形，所述两个周期变化的调幅叠加波形通过正反相整流并整形产生出一个完整的正弦波波形。
3.根据权利要求1或2所述的一种交流发电机的发电方法，其特征在于采用两个磁极数不同而同轴安装的多极永磁发电机发出不同频率的等幅交流电。
4.根据权利要求1或2所述的一种交流发电机的发电方法，其特征在于采用两个转速不同而极数相等的多极永磁发电机发出不同频率的等幅交流电。
5.根据权利要求1或2所述的一种交流发电机的发电方法，其特征在于所述可控整流电路为可控硅整流电路。
6.一种根据权利要求1－5中任意一项所述方法制成的交流发电机，其特征在于包括两个可发出不同频率等幅交流电的多极永磁发电机和一个可控整流电路和一个整形滤波电路，所述两个多极永磁发电机的定子线圈以串联方式连接，再与可控整流电路和整形滤波电路顺序相连接。
CN2011100331744A 2011-01-30 2011-01-30 一种交流发电机的发电方法及其发电机 Expired - Fee Related CN102097894B (zh)

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PCT/CN2011/082187 WO2012100578A1 (zh) 2011-01-30 2011-11-15 一种交流发电机及其发电方法
EP11856961.5A EP2670014A4 (en) 2011-01-30 2011-11-15 Alternator and electricity generation method thereof
US13/982,597 US10284126B2 (en) 2011-01-30 2011-11-15 Method of generating electricity by an alternator and a generator using the same

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