Thermo-acoustic generator

The invention discloses a thermo-acoustic generator, which comprises an isotopic heat source, a heat regenerator, a main cold end heat exchanger, an acoustic chamber, an acoustic power feedback tube and a permanent magnet motor. The permanent magnet motor comprises a permanent magnet and a coil surrounding the permanent magnet. The heat regenerator, the main cold end heat exchanger, the acoustic chamber and the acoustic power feedback tube are sequentially communicated. A temperature gradient is formed at the two ends of the heat regenerator by the isotopic heat source and the main cold end heat exchanger. Thermo-acoustic self-oscillation for converting thermal energy into acoustic energy is formed in the heat regenerator, so that self-oscillation acoustic voltage is generated, and the permanent magnet in the permanent magnet motor is driven by the self-oscillation acoustic voltage to reciprocally move to form induced electromotive force in the coil. The acoustic voltage generated by the self-oscillation of the thermo-acoustic generator is used for providing driving force for the movement of the permanent magnet to generate the induced electromotive force, the driving force for the movement of the permanent magnet is provided by the self-oscillation of the thermo-acoustic generator, and the thermo-acoustic generator does not comprise any movement part, so that the thermo-acoustic generator is high in reliability.