A heating device , configured to generate an induced magnetic field according to a voltage (Vin) provided by a power source (PS), comprising: a first capacitor (Cin) coupled to the power source (PS); a first switch (U1); a second switch (U2) coupled to the first switch (U1) at a first node (N1), and the first switch (U1) and the second switch (U2)are coupled with the first capacitor (Cin) in parallel; a second capacitor (Cr1) coupled to the first switch (U1); a third capacitor (Cr2) coupled to the second switch (U2), and coupled to the second capacitor (Cr1) at a second node (N2); a coil (L1) coupled between the first node (N1) and the second node (N2), and configured to generate the induced magnetic field; and a controller (CTL) configured to output a first control signal (S1) and a second control signal (S2) to the first switch (U1) and the second switch (U2), respectively, wherein the first control signal (S1) and the second control signal (S2) are complementary to each other, characterized in that after the heating device receives the voltage (Vin) and before the heating device receives a starting command, the controller (CTL) is configured to output a third control signal (S3) to turn on or off the second switch (U2), such that the third capacitor (Cr2) is discharged through the coil (L1) and the second switch (U2) which is turned on, and after the heating device receives the starting command, the controller (CTL) is configured to output the first control signal (S1) to turn on or off the first switch (U1), and output the second control signal (S2) to turn on or off the second switch (U2), wherein a duty cycle of the first control signal (S1) is lower than 50%, such that the first capacitor (Cin) is discharged through the first switch (U1) which is turned on, the coil (L1) and the third capacitor (Cr2). a first capacitor (Cin) coupled to the power source (PS); a first switch (U1); a second switch (U2) coupled to the first switch (U1) at a first node (N1), and the first switch (U1) and the second switch (U2)are coupled with the first capacitor (Cin) in parallel; a second capacitor (Cr1) coupled to the first switch (U1); a third capacitor (Cr2) coupled to the second switch (U2), and coupled to the second capacitor (Cr1) at a second node (N2); a coil (L1) coupled between the first node (N1) and the second node (N2), and configured to generate the induced magnetic field; and a controller (CTL) configured to output a first control signal (S1) and a second control signal (S2) to the first switch (U1) and the second switch (U2), respectively, wherein the first control signal (S1) and the second control signal (S2) are complementary to each other, characterized in that after the heating device receives the voltage (Vin) and before the heating device receives a starting command, the controller (CTL) is configured to output a third control signal (S3) to turn on or off the second switch (U2), such that the third capacitor (Cr2) is discharged through the coil (L1) and the second switch (U2) which is turned on, and after the heating device receives the starting command, the controller (CTL) is configured to output the first control signal (S1) to turn on or off the first switch (U1), and output the second control signal (S2) to turn on or off the second switch (U2), wherein a duty cycle of the first control signal (S1) is lower than 50%, such that the first capacitor (Cin) is discharged through the first switch (U1) which is turned on, the coil (L1) and the third capacitor (Cr2). <EOS>