Toshinobu Maeda

Title: The Innovations of Toshinobu Maeda

Introduction

Toshinobu Maeda is a notable inventor based in Kawanishi, Japan. He has made significant contributions to the field of motor control systems, holding a total of 3 patents. His work has been instrumental in advancing technologies related to phase-locked loop motor drive systems.

Latest Patents

One of Maeda's latest patents is a speed control circuit for phase-locked loop motor drive systems. This innovative system includes a crystal-controlled frequency source that generates reference frequency pulses at a selectable frequency for driving the motor at a desired speed. A frequency divider is coupled to the oscillator to reduce the oscillator frequency to a suitable value for comparison with the frequency and phase of a signal derived from the motor. To provide fine adjustment of the motor speed, a speed control circuit is connected between the oscillator and the frequency divider. This circuit inhibits the passage of the oscillator pulses to the frequency divider for a selectable period immediately following an output pulse from the frequency divider when it is desired to decrease the motor speed. It also injects a train of higher frequency pulses into the frequency divider while the passage of the oscillator pulses is inhibited when it is desired to increase the motor speed.

Another significant patent by Maeda is related to a motor control system that utilizes a clock pulse generator. This system derives digitally the speed-above-normal signal, the starting signal, the brake-release signal, and the normal or forward rotation signal for displaying the normal or forward rotation. In response to the starting signal, a 100% torque control voltage is generated. In cases of forced reversal in rotation, a 100% torque control voltage is generated to prevent rotation in the reverse direction.

Career Highlights

Throughout his career, Toshinobu Maeda has worked with prominent companies such as Matsushita Electric Industrial Co., Ltd. and Oki Electric Industry Co., Ltd. His experience in these organizations has contributed to his expertise in motor control technologies.

Collaborations

Maeda has collaborated with notable coworkers, including Yoshifumi Matsuoka and Yoshikazu Nakamura. These collaborations have further enriched his work and innovations in the field.

Conclusion

Toshinobu Maeda's contributions to motor control systems and his innovative patents highlight his significant role as an inventor. His work continues to influence advancements in technology, showcasing the importance