Electrical generator or motor structure – Dynamoelectric – Rotary
Utility Patent
1999-09-01
2001-01-02
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S089000, C237S01230R
Utility Patent
active
06169344
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an alternating current generator for a use of vehicle having a cooling function by means of a coolant.
2. Description of the Prior Art
FIG. 5
shows a sectional view of an alternating current generator for a vehicle disclosed by the Japanese Patent Publication No. H5-68850, wherein item
101
is a generator case in which a bowl shaped front bracket
102
, a bowl shaped rear bracket
103
and a cylindrical enclosure
104
are joined together to form divided chambers for housing parts located inside of the case and a coolant chamber located outside of the chamber. The item
107
is a sealing member such as O-ring disposed at the mating portion of the front bracket
102
and the rear bracket
103
; item
108
is a gasket arranged at the engagement portion of the front bracket
102
and the enclosure
104
; item
109
is a gasket arranged at the engagement portion of the rear bracket
3
and the enclosure
104
; item
110
is an inlet opening portion arranged on the bracket
103
; item
111
is a cylindrical stator which consists of a stator magnetic pole
112
and the stator coil
113
and is attached to the enclosure
104
; item
114
is a generator shaft attached rotatably at the center of the front bracket
102
and of the rear bracket
103
through a front bearing
115
and a rear bearing
116
; item
117
is a pulley attached to the generator shaft
114
protruded to the front side from the rear bracket
102
so that it can be rotated being united with the the generator shaft; item
118
is a rotor magnetic pole consisting of a first rotor magnetic pole member
119
engaging attached to the generator shaft
114
enabling rotation united with the generator shaft
114
and of a second rotor magnetic pole member
121
fixed to a periphery of a first rotor magnetic pole
119
through a supporting ring
120
; item
122
is a magnetic exciter which consists of an exciting pole member
123
attached to the rear bracket
103
and a exciting coil
124
attached to the magnetic exciting pole member
123
and is accepted in a cylindrical receiving portion
125
formed in the rotor magnetic pole member
118
; air gaps are formed between the stator
111
and the rotor magnetic pole member
118
and between the rotor magnetic pole member and the exciter
122
, respectively; item
126
is a thermal conducting member and it is provided for emanating heat generated in the magnetic exciter
122
and penetrates the rear bracket
103
; item
127
is a sealing material furnished at the portion where the thermal conducting member
126
penetrates the rear bracket
103
; item
128
is a plate shaped cooling cover in a form of plate and attached to the rear bracket
103
so that a second cooling chamber
129
is formed between a back surface of the rear bracket and the cooling cover; item
130
is a passage way formed in the rear bracket
103
and connects the first cooling chamber
106
and the second cooling chamber
129
; item
131
is a gasket arranged at the engagement portion of the rear bracket
103
and the cooling cover
128
; item
132
is a voltage regulator attached to the back surface of the cooling cover
128
; item
133
is a terminal of the voltage regulator; item
134
is a rectifier attached to the back surface of the cooling cover
128
; item
135
is a terminal of the rectifier; item
136
is a fixed terminal which protrudes outwardly from the enclosure
104
and is connected to the rectifier terminal
135
; item
137
is an external terminal provided in the vicinity of the rectifier
134
; item
138
is a connecting member of the external terminal
137
connected to the voltage regulator terminal
133
; item
140
is a protecting cover and is attached to the rear bracket
103
to overlay the cooling cover
128
; the voltage regulator
132
, the voltage regulator terminal
133
, the rectifier
134
, the rectifier terminal
135
, the fixed terminal
136
, and the connecting member
138
; item
141
is a hole formed in the protection cover
140
to allow projection of the external terminal
137
to outside of the protection cover
140
; item
142
is a coolant.
First of all, operation of the alternating current generation when a conventional alternating current generator is applied to an automobile will be described. The alternating current generator is mounted outside of a cylinder block of an engine, a loop belt is passed over a pulley mounted on an engine crankshaft and the pulley
117
of the alternating current generator and wirings are provided to the external terminal
137
and to a battery of an automobile. In this condition, when a driver turn on the ignition switch of the automobile electric current flows to the ignition coil from the battery thereby the engine is started and at the same time an exciting current flows to the exciting coil
124
from the battery through the voltage regulator
132
thereby a magnetic circuit is formed by the stator magnetic pole
112
, the rotor magnetic pole member
118
and the exciting magnetic pole member
123
. Then, by starting the engine as mentioned above, the generator shaft
114
rotates and in turn the rotor magnetic pole member
118
rotates and by this rotation the first rotor magnetic pole member
119
and the second magnetic pole member
121
move across the stator magnetic pole
112
alternatingly, thereby an alternating magnetic flux passes through the stator magnetic coil
113
resulting in a generation of an induced electromotive force of a three phase alternating current on the stator coil
113
. After this induced electromotive voltage is regulated by the voltage regulator
132
, it is rectified through the rectifier
134
and then the battery is charged by this rectified current supplied from the external terminal
137
through an unshown wiring.
Next, the operation of cooling with a use of a conventional alternating current generator applied to an automobile will be described. The alternating current generator is mounted on an engine, the inlet opening portion
110
and unshown outlet opening portion are connected to a cooling system of an engine. Upon starting the engine, the alternating current generator performs alternating current generation, and a water pump in a cooling system is driven thereby a coolant is circulated. Under this condition, the coolant
142
as shown by the dotted line flows through the first cooling chamber
106
, the connecting passageway
130
and the second cooling chamber
129
successively along the direction of arrow X
3
from the inlet opening portion
110
. Heat generated from the parts such as the stator
111
, the magnetic exciter
122
, the voltage regulator
132
, and the rectifier
134
due to the alternating current generation is absorbed into the coolant
142
through the thermal exchange with the coolant
142
. The coolant
142
which has absorbed the heat returns to the engine cooling system from the outlet opening portion. (Cooling system arrangement similar to this cooling system is disclosed by the
FIG. 12
of the Laid-Open publication application No. H8-130854.)
The conventional alternating current generator for a vehicle takes a form of construction as mentioned above, the first cooling chamber
106
is formed to be isolated from the parts housing chamber
105
by three separated parts of the front bracket
102
, the rear bracket
103
and the cylindrical enclosure
104
; and also the second cooling chamber
129
is formed outside the generator case
101
by means of two parts of the rear bracket
103
and the cooling cover
128
; thus, the structure of the portion which bears the cooling function by means of the coolant
142
was complicated.
SUMMARY OF THE PRESENT INVENTION
Object of the present is to provide an alternating current generator for vehicles capable of attaining a simplification of the structure of the portion which performs the cooling function.
The alternating current generator for a vehicle according to claim
1
is the one which has a cooling function by means of a coolant
Mitsubishi Denki & Kabushiki Kaisha
Ramirez Nestor
Sughrue Mion Zinn Macpeak & Seas, PLLC
Waks Joseph
LandOfFree
Alternating current generator for vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alternating current generator for vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alternating current generator for vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2508349