Asynchronous AC induction electrical machines in cross-interlockingly parallel connection

The asynchronous AC induction electrical machines in cross-interlockingly series connection, which discloses that at least two asynchronous AC induction electrical machines (hereinafter referred to as electrical machine) in series connection with the power source are respectively installed with main winding and control winding for electrical machine operation, wherein the two electrical machines being combined by taking the example of cross-interlockingly series connection comprises the following:

• The first electrical machine control winding and the first electrical machine main winding are windingly installed on the same polar axis or windingly installed at electrical angle between polar axes within the first electrical machine, wherein the two electrical machines are optionally operated in cross-interlockingly series connection according to operating requirements of the polarity relationship between the two to appear 1) additional exciting operation in the same polarities, or 2) differential exciting operation in reverse polarities;
• The second electrical machine control winding and the second electrical machine main winding are windingly installed on the same polar axis or windingly installed at electrical angle between polar axes within the second electrical machine wherein the two electrical machines are optionally operated in cross-interlockingly series connection according to operating requirements of the polarity relationship between the two to appear 1) additional exciting operation in the same polarities, or 2) differential exciting operation in reverse polarities;
• The first electrical machine main winding is the main operating winding of the first electrical machine, while the first terminal of the first electrical machine control winding is connected with the second terminal of the second electrical machine main winding installed in the second electrical machine;
• The second electrical machine main winding is the main operating winding of the second electrical machine, wherein the first terminal of the second electrical machine control winding is connected with the second terminal of the first electrical machine main winding installed in the first electrical machine;
• The first terminal of the first electrical machine main winding is connected with the second terminal of the first electrical machine control winding;
• The first terminal of the second electrical machine main winding and the second terminal of the second electrical machine control winding are respectively connected with the power source for input or output electric power;
• The windings of said first electrical machine and second electrical machine are series connected and are driven by the power source, wherein the operation effect of the first electrical machine and the second electrical machine being cross-interlockingly series connected to drive the load individually is led by the changes of individual electrical machine driving loading statuses to appear variable impedance operation so as to change the end voltage ratio between individual electrical machines in cross-interlockingly series connections thereby allowing each individual electrical machine to produce interaction of required electromagnetic effect.