Hitachi had 35 patents in internet of things during Q1 2024. Hitachi Ltd filed patents in Q1 2024 for a power conversion device that controls output frequency, voltage, and current of a motor, an operational information management system for accurately determining operation motions, a video display device wearable on the head with motion detection capabilities, a system for evaluating brain dysfunction based on hand coordination movements, and an automatic analysis device that ensures safety and improves operability by analyzing voice instructions for equipment operation. GlobalData’s report on Hitachi gives a 360-degree view of the company including its patenting strategy. Buy the report here.

Hitachi grant share with internet of things as a theme is 57% in Q1 2024. Grant share is based on the ratio of number of grants to total number of patents.

Recent Patents

Application: Power conversion device (Patent ID: US20240097589A1)

The patent filed by Hitachi Ltd. describes a power conversion device that includes a power converter and a control unit. The control unit calculates reactive and active power based on various parameters and frequency estimates to ensure that the output power of the motor aligns with the desired values. The device also employs proportional and integral control methods to minimize deviations between the calculated powers and phase error estimates, adjusting based on the motor's rotation speed.

Furthermore, the control unit of the power conversion device feedbacks output voltage, output current, and phase error estimates to an IOT controller for analysis and can modify the electrical circuit parameters of the motor. The device allows for flexibility in control response settings, enabling the switching between different frequency domains and control methods based on the requirements of the application and the motor's operating speed. Overall, the patent outlines a sophisticated control system for power conversion that optimizes motor performance and efficiency through precise power calculations and error estimation techniques.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.