REGENERATIVE BRAKE SYSTEMAbstractAn electromagnetic brake system includes a motor having a rotor with a rotatable disk fixed to the rotor and an electromagnetic brake disposed about the disk to selectively prevent rotation of the rotor. The electromagnetic brake is carried on a resilient element so that it is suspended relative to the disk and isolated from the remainder of the system reducing the propagation of structural and airborne noise generated by actuation of the electromagnetic brake.

BACKGROUND OF THE INVENTION The present invention relates to electromagnetic brakes and more particularly, to a motor driven system including a floating electromagnetic brake that is operable to prevent rotation of the motor. Motor driven systems that incorporate an electromagnetic brake to prevent rotation of the motor are known. One type of system that may incorporate an electromagnetic brake for a motor is a vehicle anti-lock brake system. A vehicle anti-lock braking system with an electromagnetic brake is described in U.S. Pat. No. 5,000,523 which issued Mar. 19, 1991. That patent discloses an anti-lock braking system with a piston that is slidably mounted within a longitudinal bore. Movement of the piston provides a variable control volume that is in communication with a wheel brake to effect modulation of fluid pressure in actuating the wheel brake. A threaded nut is connected to the piston and the nut is slidably mounted within the longitudinal bore in a nonrotatable fashion. A power screw projects into the nut and is in threaded engagement therewith. The power screw is connected to a gear train and therethrough, to a reversible motor which powers the power screw and which is responsive to signals given to it by a controller. As disclosed in U.S. Pat. No. 5,000,523 fluid pressure in the control volume can back drive the piston. Accordingly, this known undesirable effect was overcome by the addition of an electromagnetic brake that prevents back driving of the motor. The electromagnetic brake includes a disk that is connected to the end of the motor's rotor. A plunger is located above the disk and cooperates with the top surface of the motor housing to provide friction surfaces for engagement with the disk to restrain rotation thereof. This results in preventing undesirable movement of the piston within the longitudinal bore in response to fluid pressure in the control volume.The plunger is biased by a coil spring to urge the friction surfaces into engagement with the disk. Above the disk is an electromagnetic coil which is responsive to a signal given by the controller to move the plunger to a position allowing for disengagement of the friction surfaces from the disk and thereby allowing movement of the piston within the longitudinal bore. According to this prior art device the electromagnetic brake is actuated from its normally locked position whenever it is necessary to effect a change in the wheel brake pressure during every brake apply and release.

A Tesla Model S P85+ using regenerative breaking power in excess of 60 kW.

Publication numberUS5775467 AApplication numberUS 08/688,696Publication dateJul 7, 1998Filing dateJul 29, 1996Priority dateJul 29, 1996Fee statusLapsedInventorsErik Forrest Knuth, Abraham Shawky Farag, William Frank Borchers, Loren Emil MajersikOriginal AssigneeGeneral Motors CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (14), Classifications (17), Legal Events (5)

MK C1 more dynamic and efficient braking through integrationWith the MK C1, the brake actuation feature, the brake booster and the control systems (ABS, ESC) are combined into a compact, weight-saving braking module. The electro-hydraulic MK C1 can build up braking pressure significantly faster than conventional hydraulic systems, thereby fulfilling the increased pressure dynamics requirements for new advanced driver assistance systems in order to prevent accidents and protect pedestrians. In addition, the system can fulfill the requirements for a recuperative braking system without any additional measures, while providing a high level of convenience.

SWOTAnalysis

STRENGTHS1. Large Market Share2. Global Experience3. Variety of Brand Names4. GMAC Customer Financing Program5. OnStar Satellite TechnologyWEAKNESSES1. Behind on Alternative Energy Movement 2. Poor Organizational Structure3. Stagnant Profitability4. Overly Dependent on US Market5. Overly Dependent on General Motors6. Acceptance Corporation (GMAC) Financing Poor Credit Status

OPPORTUNITIES1. Alternative Energy Movement2. Continuing to Expand Globally3. Develop New Vehicles Styles and ModelsTHREATS1. Growth of Competitors2. Pension Payouts3. Increased Health Care Costs Rising Supply Costs, i.e Steel

Pestel Analysis

Economic FactorsTo commence with the economic factors, the whole continent was going through recession in the year 2008 and everybody, right from customers to the raw material suppliers were curtailing there expenses which just made the condition more suffering. This also left a deep impact on the macro-environment which resulted in unemployment. As an automobile industry, besides being a merchandiser, GM group is also a major consumer of various metals, textile, rubber, plastic, vinyl and computer chips.

Political FactorsPolitical environment can be inferred as all the aspects of the government which affect the sales and the purchase directly or indirectly, i.e. any one of the aspect affects the functioning of a company positively as well as negatively. The rules of the government have always been against the ignorance of the company towards environmental as well as safety regulations since 1960.

Technological FactorsSince time has progressed, so has technology, which is a dominating factor in the performance of a firm. As a matter of fact, companies should be ready to mould themselves according to the demands of the customers which rapidly changes due to advancements in technology and subsequent transformations in the market. The company not only makes full use of the evolving technology to constantly innovate itself for the cut throat competition by the rivals but also uses it for reaching out to the customers and understanding their needs and comfort better. Technology is also used by the company to reach out to the customers more efficiently through more effective distribution channels.

Social FactorsSocial aspect is also one of the vital contributions for analysis of any firm. The condition is simpler when dealing with a national entity but gets complex when a multinational firm is under consideration, reason being each county has a different perception towards its buying habits depending upon education, requirement and various other features such as urbanization.

Name: Kushal DeyRoll No. 314SM1005School Of Management

Claims1. An electromagnetic brake system comprising:a motor having a rotor carried in a housing with a shaft extending from the housing and being rotatable with the rotor;a disk carried by the shaft and being fixed to the shaft to rotate in concert therewith;an electromagnetic brake disposed about the disk including a body, a coil carried by the body and a plunger disposed between the coil and the disk; andat least one resilient element interposed between the housing and the body wherein the body is suspended on the housing by the resilient element so that the electromagnetic brake floats on the resilient element relative to the housing and the disk.2. An electromagnetic brake system according to claim 1 wherein the electromagnetic brake including the body, the coil and the plunger, floats on the at least one resilient element relative to the housing and the disk.3. An electromagnetic brake system according to claim 1 wherein the at least one resilient element comprises an elastomeric block fixed between the housing of the motor and the body of the electromagnetic brake.4. An electromagnetic brake system according to claim 1 further comprising a plurality of fasteners extending into the housing of the motor and into the body of the electromagnetic brake wherein the at least one resilient element comprises a plurality of grommets having a soft body with a pair of rigid mounting inserts carried between the motor and the body of the electromagnetic brake.5. An electromagnetic brake system according to claim 2 wherein the electromagnetic brake floats both laterally and longitudinally relative to the motor shaft.

DIFFERENT TYPES OF REGENERATIVE BRAKING SYSTEM

Sale of Regenerative Braking System

MARKET ANALYSIS

APPLICATION OF REGENERATIVE BRAKING SYSTEM

SUPER-CAPACITOR IN MAZDA A-6APPLICATION OF REGENERATIVE BRAKING SYSTEM Super capacitor accept and release charge much more quickly. It can be discharged and recharged many more times and with far deterioration than a battery. The Mazda Unit can accept a full charge in just 8-10 seconds The capacitor may take up to about 113s when the load is at minimum about 18A.