David Hoon Cho

US Patent:

20070040529, Feb 22, 2007

Filed:

Aug 19, 2005

Appl. No.:

11/206943

Inventors:

Takashi Takebayashi - Irvine CA, US
David Cho - Anaheim CA, US
Pavel Tomov - Irvine CA, US
Dipen Gokhale - Cerritos CA, US

Assignee:

SMC Corporation of America - Indianapolis IN

International Classification:

G05B 19/40

US Classification:

318685000

Abstract:

A stepping motor is driven in both closed-loop and open-loop modes while initiating microstepping after a predetermined threshold velocity has been reached. A feedback device such as an encoder is mounted on the stepping motor shaft and the encoder keeps track of the mechanical position of the rotor. Based on feedback from the encoder, stator phases are activated to maintain a 90 phase advance and produce maximum torque. A lead angle compensation technique is used to advance the motor lead angle, to allow for the excitation currents to reach maximum even at higher speeds. The stepping motor controller employs this strategy in order to produce maximum torque across a wide range of motor speeds and actuator motions.

US Patent:

20220180416, Jun 9, 2022

Filed:

Nov 24, 2021

Appl. No.:

17/535553

Inventors:

BILL BORDEN SHOOK - TEMECULA CA, US
DAVID CHO - OXNARD CA, US

International Classification:

G06Q 30/06
H04L 9/32

Abstract:

An innovative system and method is implemented to facilitate a blockchain based labor arbitrage. The system uses a processor to manage labor arbitrage between business operator devices and laborer devices. The method starts with a description for a job request received from a business operator device. After distributing the job description, the method receives proposals from the laborer devices. Then method matches a primary laborer device to the job description and generates a smart contract in the blockchain between the business operator device and the primary laborer device. Upon job completion, the method verifies that all job requirements plus quality standards are satisfactorily met and signatures of both the business operator device and the primary laborer device are validated, the method transmits a compensation of a predetermined type and amount of cryptographic token to the primary laborer device. With any disputes, the method further provides an arbitration process.