Because of these shortcomings of the existing time-grating angular position sensor with multi-phase excitation, such as the accuracy, stability and dynamic performance improved difficulty in a small volume because of the difficulty of arranging further pole pairs, an angular position measurement method for capacitive type time-grating with single-phase excitation is proposed. In this method, the single-phase excitation is used to couple into four orthogonal signals in the space field, which can be constructed travelling-wave in time and space field simultaneously by a circuit. Then, an angular position measurement can be realized. In this article, these shortcomings of time-grating with multi-phase excitation, the measurement principle of time-grating with single-phase excitation, and the sensor prototype are introduced. The effectiveness of this measurement principle is evaluated by experiments. Experimental results show that the accuracy and dynamic performance of single-phase excitation sensors are better than multiphase excitation sensors with the same size and the same number of electrodes. the prototype accuracy of ±20″ and stability of 10″ were obtained. Speed fluctuation of ±1. 25% and the following error is ±2. 5″ under 400 rpm can meet the requirements of direct-drive motors.