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This paper proposes a resonance suppression method for a single-inverter dual-parallel (SIDP) interior permanent magnet synchronous motor (IPMSM) drives via phase lead compensation. In the low-speed region that includes the natural frequency, the SIDP IPMSM system becomes more susceptible to resonance, which degrades speed synchronization. The proposed method uses the d-axis current of the actively controlled primary motor to generate a compensation current, which stabilizes the secondary motor sharing the same voltage input. In this low torque-difference condition, the reduced rotor position difference weakens the coupling effect of the primary d-axis current on the secondary motor current, thereby requiring a larger compensation current to maintain performance. The proposed phase lead compensator, tuned to the resonance frequency, increases the phase margin of the compensation current and enhances system stability, effectively suppressing oscillations in this operating condition. Experimental results confirm that the proposed method provides stable control performance in the SIDP IPMSM system.