CN207939399U - Food cooking machine and its power supply circuit - Google Patents

Abstract

The utility model discloses a kind of food cooking machine and its power supply circuit, the circuit includes：The input terminal of rectifier bridge, rectifier bridge is connected with AC power, for AC power to be converted to DC power supply, to supply driving motor；Charging resistor, one end of charging resistor are connected with the first output end of rectifier bridge, output end of the other end as power supply circuit；The controllable switch being connected in parallel with charging resistor；Electrolytic capacitor, the positive terminal of electrolytic capacitor are connected with the other end of charging resistor, and negative pole end is grounded after being connected with the second output terminal of rectifier bridge, for carrying out voltage stabilizing to DC power supply；Controller, controller is connected with the control terminal of controllable switch, controller controls controllable switch disconnection when food cooking machine powers on, so that DC power supply is charged by charging resistor to electrolytic capacitor, and control controllable switch is closed after the rising of the voltage at electrolytic capacitor both ends.It can not only avoid forming electric arc when powering on as a result, improve user security, and can realize quick charge.

Description

Food cooking machine and its power supply circuit

Technical field

The utility model is related to household electrical appliance technical field, more particularly to the power supply circuit and one kind of a kind of food cooking machine Food cooking machine with the power supply circuit.

Background technology

When using DC brushless motor on food cooking machine (such as wall-breaking machine), it will usually in the output end parallel connection one of bridge heap The bulky capacitor of a hundreds of microfarad (generally in 400uf-800uf or so).

When the power supply circuit of wall-breaking machine is powered moment, bulky capacitor can be equivalent to the short-circuit (initial voltage at bulky capacitor both ends For 0V, voltage instantaneous will not saltus step).Therefore, transient flow cross the electric current of bulky capacitor can be very big, high current can inserting in wall-breaking machine Electric arc is generated on head, threatens user security, while being also possible to electric switch can be caused to trip.

Utility model content

The utility model is intended to one of the technical issues of at least solving in the related technology to a certain extent.For this purpose, this reality It is to propose that a kind of power supply circuit of food cooking machine, the circuit can not only be avoided when powering on first novel purpose Electric arc is formed, user security is improved and electric switch is avoided to trip, and can realize quick charge.

Second purpose of the utility model is to propose a kind of food cooking machine.

To achieve the above object, on the one hand the utility model proposes a kind of power supply circuit of food cooking machine, the food Object cooking machine includes driving motor, and the power supply circuit includes：Rectifier bridge, input terminal and the AC power phase of the rectifier bridge Even, the AC power is converted to DC power supply by the rectifier bridge, to supply the driving motor；Charging resistor, it is described to fill One end of resistance is connected with the first output end of the rectifier bridge, and the other end of the charging resistor is as the power supply circuit Output end；Controllable switch, the controllable switch are connected in parallel with the charging resistor；Electrolytic capacitor, the electrolytic capacitor Positive terminal is connected with the other end of the charging resistor, the second output terminal of the negative pole end of the electrolytic capacitor and the rectifier bridge It is grounded after being connected, the electrolytic capacitor carries out voltage stabilizing to the DC power supply；Controller, the controller and the controllable switch Control terminal be connected, the controller controls the controllable switch when the food cooking machine powers on and disconnects, so that described straight Galvanic electricity source is charged by the charging resistor to the electrolytic capacitor, and is controlled after the rising of the voltage at the electrolytic capacitor both ends The controllable switch is closed.

According to the utility model proposes food cooking machine power supply circuit, by the input terminal of rectifier bridge and AC power phase Even, one end of charging resistor is connected with the first output end of rectifier bridge, the output of the other end of charging resistor as power supply circuit End, controllable switch are connected in parallel with charging resistor, and the positive terminal of electrolytic capacitor is connected with the other end of charging resistor, electrolytic capacitor Negative pole end be connected with the second output terminal of rectifier bridge after be grounded, controller is connected with the control terminal of controllable switch, and controller exists Controllable switch is controlled when food cooking machine powers on to disconnect, so that DC power supply is charged by charging resistor to electrolytic capacitor, and Control controllable switch is closed after the voltage at electrolytic capacitor both ends rises.The circuit can not only be avoided when food cooking machine powers on Electric arc is formed, user security is improved and electric switch is avoided to trip, and can realize quick charge.

In addition, can also be had according to the power supply circuit of the utility model food cooking machine set forth above following additional Technical characteristic：

Specifically, the driving motor includes：Stator core, the stator core include the stator yoke and multiple of annular The width of stator teeth, the stator yoke is W, and multiple stator teeths are set to the inner peripheral surface of the stator yoke, adjacent Stator tooth socket is formed between two stator teeths, multiple stator teeths limit coaxial with the stator yoke Stator hole, each stator teeth include the stator teeth main body being connected with the stator yoke and are located at the stator teeth The width of the stator tooth boots of the inner end of main body, each stator teeth main body is V, wherein W：V=0.6-0.7；Rotor iron Core, the rotor core are rotatably arranged in the stator hole and coaxial with the stator hole.

Specifically, the driving motor includes：Stator core, the stator core include the stator yoke of annular and are set to Multiple stator teeths of the inner peripheral surface of the stator yoke are formed with stator tooth socket between the two neighboring stator teeth, more A stator teeth limits the stator hole coaxial with the stator yoke, and the maximum radial dimension of the stator yoke is D； Rotor core, the rotor core is rotatably arranged in the stator hole and, the rotor core coaxial with the stator hole Maximum radial dimension be d, wherein D and d meet：0.4≤d/D≤0.55.

Specifically, the controllable switch is relay.

Specifically, the charging resistor is variable resistance.

Specifically, the driving motor is DC brushless motor.

Further, the power supply circuit of above-mentioned food cooking machine further includes voltage detecting circuit, the voltage detecting electricity Road is connected with the controller, and the voltage detecting circuit is detecting the voltage at the electrolytic capacitor both ends, wherein the control Device processed controlled when the voltage detecting circuit detects that the voltage at the electrolytic capacitor both ends rises to predeterminated voltage described in can Control switch is closed.

Specifically, the voltage detecting circuit includes first resistor and second resistance, one end of the first resistor and institute The positive terminal for stating electrolytic capacitor is connected, and the other end of the first resistor is connected with one end of the second resistance and has first Node, the other end of the second resistance are connected with the negative pole end of the electrolytic capacitor, the first node and the controller It is connected.

Specifically, the capacitance of the electrolytic capacitor is 400uf-800uf.

Specifically, the food cooking machine is wall-breaking machine.

To achieve the above object, on the other hand the utility model proposes a kind of food cooking machine comprising above-mentioned food The power supply circuit of object cooking machine.

The utility model proposes food cooking machine can not only be kept away by the power supply circuit of above-mentioned food cooking machine Exempt to form electric arc when food cooking machine powers on, improve user security and electric switch is avoided to trip, and can realize quickly Charging.

Description of the drawings

Fig. 1 is the structural schematic diagram according to the food cooking machine of the utility model one embodiment；

Fig. 2 is the assembly signal according to the stator core and rotor core of the driving motor of the utility model one embodiment Figure；

Fig. 3 is the structural schematic diagram according to the rotor core of the driving motor of the utility model one embodiment；

Fig. 4 is the structural schematic diagram according to the rotor core of the driving motor of the utility model another embodiment；

Fig. 5 is the circuit diagram according to the power supply circuit of the food cooking machine of the utility model embodiment；And

Fig. 6 is the circuit diagram according to the power supply circuit of the food cooking machine of the utility model one embodiment.

Specific implementation mode

The utility model is described below in detail, the example is shown in the accompanying drawings, wherein identical from beginning to end or class As label indicate same or similar element or element with the same or similar functions.Below with reference to attached drawing description It is exemplary, it is intended to for explaining the utility model, and should not be understood as limiting the present invention.

The power supply circuit and tool of the food cooking machine proposed according to the utility model embodiment described with reference to the accompanying drawings There is the food cooking machine of the power supply circuit.

In the embodiments of the present invention, food cooking machine may include driving motor.

As shown in Figure 1, the food cooking machine 200 of the utility model embodiment may include：At cooking container 210, food Manage part (not shown) and the driving motor 100 for food cooking machine 200, wherein driving motor 100 can be brush DC The power of motor, DC brushless motor is 500W to 2000W, and brshless DC motor commutates without carbon brush, therefore is not present The noise of the phenomenon that carbon brush abrasion, driving motor 100 are lower, and the service life is longer for driving motor 100.

Specifically, could be formed with the food accommodating chamber for holding food in cooking container 210, Food processing part can To be sequentially connected with driving motor 100, and Food processing part can stretch into food accommodating chamber.Food processing part can as a result, To be rotated relative to cooking container 210 under the drive of driving motor 100, and then the food in food accommodating chamber can be carried out Processing.

Further, as shown in Figure 1, food cooking machine 200 can also include engine base 220, cooking container 210 can be cup Body component, cup body component are detachably arranged at engine base 220, in order to pick and place food and cleaned to cup body component.Driving electricity Machine 100 can be installed on engine base 220, and Food processing part can be the knife assembly being connected with cup body component, be set in cup body component When engine base 220, driving motor 100 can be sequentially connected with knife assembly, and driving motor 100 can drive knife assembly opposite as a result, It is rotated in cup body component, so that knife assembly can carry out food the processing such as to cut.

Shown in Fig. 1, food cooking machine 200 can also include：Electric-control system 230 and display module 240.Its In, electric-control system 230 includes electric-controlled plate, and electric-controlled plate can be installed on engine base 220, and electric-controlled plate can be with driving motor 100 Electrical connection is to control the work of driving motor 100.

Display module 240 can also be installed on engine base 220, and display module 240 can be connected with electric-control system 230. Display module 240 is displayed for the working condition of food processor 200, and in the further implementation of the utility model In example, there can be operation button on display module 240, user can control electric-control system 230 by operation button, and then control The operating mode of food processor 200 processed and state etc., it is more convenient to use.

Referring to figs. 1 to Fig. 4, according to the driving motor 100 for food cooking machine 200 of the utility model one embodiment It may include stator core 10, wherein stator core 10 may include：Stator yoke 11 and stator teeth 12.

Specifically, stator teeth 12 can be multiple, stator yoke 11 can be annular, and multiple stator teeths 12 can be with Inner peripheral surface set on annular stator yoke portion 11, and multiple stator teeths 12 can limit the stator coaxial with stator yoke 11 Hole 102.Stator yoke 11 can be that multiple stator teeths 12 provide mechanical support, and 12 position of stator teeth is made to fix.It is multiple fixed Sub- teeth portion 12 can could be formed with stator between the circumferentially spaced distribution of stator yoke 11, two neighboring stator teeth 12 Tooth socket 101, winding 14 can be wrapped in stator teeth 12 by stator tooth socket 101.

It should be noted that in the present invention, the quantity of stator teeth 12 can need flexibly according to actual conditions It is arranged, stator teeth 12 is six purposes for being given for example only explanation in Fig. 2, in other embodiments of the utility model, Stator teeth 12 or two, four or more, this is within the protection scope of the utility model.

In the related art, the yoke of motor (for example, driving motor 100) stator is wide and the wide ratio of teeth portion is not fixed Value, usual ratio is mostly 0.4-0.6, and stator yoke is made to undertake the iron loss of greater proportion, to reduce the fever Wen Sheng of stator teeth, But stator yoke temperature can be brought to rise excessively high problem.If solving above-mentioned ask by the shell that jacketed one magnetically permeable on motor Topic, the magnetic flux density of stator yoke can be reduced to a certain extent, reduce the iron loss of stator yoke, but can increase material and Process costs.

And in the present invention, with reference to shown in Fig. 2, each stator teeth 12 may include：121 He of stator teeth main body Stator tooth boots 122.Wherein, stator teeth main body 121 is connected with stator yoke 11, makes stator teeth 12 and stator yoke 11 can be with It is connected as one.Stator tooth boots 122 are located at the inner end of stator teeth main body 121, can reduce stator teeth 12 and rotor core Air-gap reluctance between 20 improves Distribution of Magnetic Field.On the other hand the winding 14 that can be located at opposing connection on stator teeth 12 is fixed, Prevent winding 14 from being loosened by the inner end of stator teeth 12, winding 14 is fixed relatively reliable.

In addition, the width of stator yoke 11 is W, the width of each stator teeth main body 121 is V.For etc. shapes determine Sub- iron core 10, i.e. mono- timings of maximum radial dimension D of stator core 10, if W：V is too small, and the magnetic flux of stator teeth 12 can be caused close Height is spent, or even flux density saturation occurs, in 10 course of work of stator core, the iron loss of stator teeth 12 is larger, stator The temperature of teeth portion 12 rises excessively high.And the stator tooth socket 101 between two neighboring stator teeth 12 is too small, two neighboring stator teeth 12 apart from too short, is easy to form electromagnetic circuit, and then reduce the efficiency of stator core 10 (that is, driving motor 100).

If W：V is excessive, the magnetic flux density of stator yoke 11 can be caused excessively high, or even flux density saturation occur, in stator In 10 course of work of iron core, the iron loss of stator yoke 11 is larger and temperature occurs and rises excessively high phenomenon.

Therefore, in some embodiments of the utility model, the width W of stator yoke 11 and each stator teeth main body 121 width V can meet W：V=0.6-0.7, stator yoke 11 and stator teeth 12 can more reasonably distribute stator core 10 magnetic flux density prevents 10 local temperature rise's higher of stator core, keeps the Wen Sheng of stator core 10 more balanced, to improve stator 10 service life of iron core and security performance.For example, in some specific embodiments of the utility model, the width of stator yoke 11 The ratio W of W and the width V of stator teeth main body 121：V can be respectively 0.6,0.62,0.65,0.68 and 0.7 etc..

It should be noted that in the present invention, the width W of stator yoke 11 can be understood as the stator yoke of annular The width V of the distance between 11 inner peripheral surface and peripheral surface, stator teeth main body 121 can be understood as stator teeth main body 121 Two side the distance between circumferential along stator yoke 11.

In addition, the distance between the inner peripheral surface and peripheral surface of the stator yoke 11 of annular can be identical everywhere, and certainly, annular Stator yoke 11 inner peripheral surface and the distance between peripheral surface can also be not exactly the same, annular stator yoke 11 The distance between inner peripheral surface and peripheral surface can it is identical everywhere can not also be identical.But in the present invention, stator The width W of any position in yoke portion 11 and the width V of any position of stator teeth main body 121 meet W：V=0.6- 0.7。

According to the width W and stator teeth main body 121 of the stator yoke 11 of the stator core 10 of the utility model embodiment Width V meet W：V=0.6-0.7, magnetic flux density distribution it is more reasonable, Wen Sheng is more balanced, be conducive to improve service life and Safety.

Further to make the Wen Shenggeng of stator core 10 low, according to the utility model further embodiment, stator yoke 11 width W and the width V of stator teeth main body 121 can further meet：W：V=0.64-0.66.

Some embodiments according to the present utility model, as shown in Fig. 2, the width of stator yoke 11 can be equal everywhere, often The width of a stator teeth main body 121 can be equal everywhere, and in order to the mold design of 10 forming process of stator core, technique is more Add simple.

Further, with continued reference to shown in Fig. 2, stator yoke 11 can be Internal periphery and outer profile is circular annulus The structure of shape, stator yoke 11 is simple and convenient for molding.

In addition, the width bisector of each stator teeth main body 121 can pass through the center of stator hole 102, that is to say, that Each 121 radially extending along stator hole 102 of stator teeth main body is conducive to keep Distribution of Magnetic Field more symmetrical uniformly.

Further, with reference to shown in Fig. 2, in the circumferential direction of stator yoke 11, the both ends of stator tooth boots 122 can prolong respectively It stretches and exceeds stator teeth main body 121, the abutting end of two neighboring stator tooth boots 122 is spaced apart or connected.Thus, it is possible to opposing connection The winding 14 for being located at stator teeth 12 is fixed, and prevents winding 14 from being loosened by the inner end of stator teeth 12, and winding 14 is fixed more Add reliable.

Can also include multiple positioning protrusion 13, multiple positioning protrusion according to the stator core 10 of the utility model embodiment 13 can be along the circumferentially-spaced peripheral surface for being opened in stator yoke 11 of stator yoke 11, and each positioning protrusion 13 can edge Stator yoke 11 radially extends.As a result, when driving motor 100 is assembled, stator core 10 can pass through positioning protrusion 13 are positioned with the holder of driving motor 100, and driving motor 100 is made to assemble simpler convenience and accurate positioning.

It should be noted that the utility model the quantity of positioning protrusion 13 and installation position are not done it is specifically limited, for example, In specific embodiment as shown in Figure 2, the quantity of positioning protrusion 13 is equal with the quantity of stator teeth 12, and positioning protrusion 13 are arranged the peripheral surface in stator yoke 11 correspondingly with 12 position of stator teeth, are convenient for the mold design of stator core 10 And molding.In some unshowned embodiments of the utility model, the quantity of positioning protrusion 13 and position can also be with stators Teeth portion 12 does not correspond, it is only necessary to meet positioning protrusion 13 and be spaced apart the peripheral surface set on stator yoke 11 to realize to stator The requirement that iron core 10 positions.

Shown in Fig. 4, according to the driving for food cooking machine 200 of another embodiment of the utility model Motor 100 may include：Stator core 10 and rotor core 20.

Specifically, stator core 10 may include stator yoke 11 and multiple stator teeths 12, wherein stator yoke 11 For annular, multiple stator teeths 12 can be set to the inner peripheral surface in annular stator yoke portion 11, and stator yoke 11 can be multiple stators Teeth portion 12 provides mechanical support, and 12 position of stator teeth is made to fix.Multiple stator teeths 12 can be along the circumferential direction of stator yoke 11 It is spaced apart distribution, could be formed with stator tooth socket 101 between two neighboring stator teeth 12,100 winding of driving motor can be through It crosses stator tooth socket 101 and is wrapped in stator teeth 12.

In addition, multiple stator teeths 12 can limit the stator hole 102 coaxial with stator yoke 11, rotor core 20 can To be located in stator hole 102, and rotor core 20 can be coaxial with stator hole 102.Rotor core 20 can in stator hole 102 To be rotated about axis, and rotor core 20 can be spaced apart preset distance between the inner peripheral surface of stator hole 102, so as to turn The rotation of sub- iron core 20 is more smooth.

As a result, after 14 circulating current of winding of driving motor 100, multiple stator teeths 12 can be made to form multipair magnetic pole, it is fixed Magnetic field is generated in sub-aperture 102, the rotor core 20 in stator hole 102 can be rotated about axis under the influence of a magnetic field, with Realize the conversion and output of electric energy.

In the related art, the root diameter of motor (for example, driving motor 100) is not fixed with stator diameter ratio Value, usually mostly 0.60-0.75, within this range, although motor can export larger torque, the high speed performance of motor It is poor, and the cogging torque of motor increases, and motor easy tos produce vibration and larger noise.If by drive control electricity Increase weak magnetic effect in the algorithm on road to solve the above problems, then can reduce the efficiency of motor.

And in the present invention, the maximum radial dimension D of the stator yoke 11 and maximum radial dimension d of rotor core 20 Meet 0.4≤d/D≤0.55.For example, in some specific embodiments of the utility model, the maximum radial ruler of stator yoke 11 The ratio d/D of very little D and the maximum radial dimension d of rotor core 20 can be respectively 0.45,0.48,0.51 and 0.54 etc..

In the case that the maximum radial dimension D of stator yoke 11 is certain, as d/D ＜ 0.4, the maximum diameter of rotor core 20 It is too small to size d, if 100 low speed of driving motor is run, for example, the rotating speed ＜ 5000rpm of driving motor 100, rotor core 20 load capacity is too small, drives under the operating mode loaded on an equal basis, rotor core 20 too small maximum radial dimension d can seriously be sent out Heat influences the normal operation of driving motor 100, reduces by 100 efficiency of driving motor, in some instances it may even be possible to be damaged.

In the case that the maximum radial dimension D of stator yoke 11 is certain, as d/D ＞ 0.55, driving motor 100 can be caused Cogging torque become larger, the rotary inertia of rotor core 20 becomes larger, if 100 high-speed cruising of driving motor, for example, driving motor When 100 rotating speed ＞ 10000rpm, driving motor 100 will produce vibration, and then generate larger noise, influence driving motor The use feeling of 100 performances and user.

Therefore, the maximum radial dimension d of the maximum radial dimension D Yu rotor core 20 of stator yoke 11 meet 0.4≤d/D ≤ 0.55, the power output of the rotor core 20 of driving motor 100 can be improved, driving motor 100 is more efficient, prevents rotor iron Core 20 generate heat, it is safer, and the maximum radial dimension d of rotor core 20 can be done it is small, when eliminating high-speed rotation turn The inertia that sub- iron core 20 generates, prevents driving motor 100 from generating larger vibrating noise.

In addition, it is necessary to explanation, in some embodiments of the utility model, stator core 10 and rotor core 20 Outer profile is circle, then maximum radial dimension refers to the diameter of the rounded outer profiles of stator core 10 and rotor core 20.And at this In other embodiments of utility model, the outer profile of stator core 10 and rotor core 20 is not circle, then maximum radial ruler The size of the maximum position of radial dimension for crossing axis of the very little outer profile that can be understood as stator core 10 and rotor core 20.

Most according to the stator yoke 11 of the driving motor 100 for food processor 200 of the utility model embodiment Big radial direction dimension D and the maximum radial dimension d of rotor core 20 meet 0.4≤d/D≤0.55, efficiently solve driving motor 100 low speed power output is small and the big problem of vibration at high speed noise, improves the efficiency and security performance of driving motor 100.

To further increase the low speed power output of driving motor 100 and reducing the high speed noise of driving motor 100, according to this Utility model further embodiment, the maximum radial dimension D of the stator yoke 11 and maximum radial dimension d of rotor core 20 can Further to meet：0.5≤d/D≤0.55.

Some embodiments according to the present utility model can be equipped with multiple magnetic as shown in Figures 2 to 4 in rotor core 20 Body slot 23, multiple magnet slots 23 can be along the circumferentially spaced setting of rotor core 20, and the both ends of magnet slot 23 can be divided The axial both ends of rotor core 20 are not extended to, and multiple permanent magnets 25 can be correspondingly plugged in multiple magnet slots 23.

Permanent magnet 25 can extend to the axial both ends of rotor core 20, the position of permanent magnet 25 in magnet slot 23 as a result, It is reliable to set fixation, permanent magnet 25 can be effectively prevent to loosen.And multiple permanent magnets 25 can form multipair magnetic pole, with production Magnetisation field, and then induced electromotive force is generated, realize the conversion of electric energy.Rotor core 20 using permanent magnet 25 is without being arranged excitation Coil not only improves the weight for mitigating driving motor 100, reduces the volume of driving motor 100, and is not necessarily to start on startup Excitation, startup is more quick, more energy saving.

It should be noted that the utility model the quantity of magnet slot 23 and permanent magnet 25 is not done it is specifically limited, it is only necessary to Meet multiple permanent magnets 25 to be plugged in correspondingly in multiple magnet slots 23 to realize the fixation of permanent magnet 25 and be formed multiple The requirement of magnetic pole.For example, in specific embodiment as shown in Figure 3 and Figure 4, magnet slot 23 and permanent magnet 25 are respectively four A, four permanent magnets 25 are plugged in respectively in four magnet slots 23.For another example in other embodiments of the utility model, Magnet slot 23 and permanent magnet 25 can also be respectively two, six, eight or more, this is all in the protection of the utility model Within the scope of.

In addition, each at least one end of magnet slot 23 in the circumferential direction of rotor core 20 can be equipped with locating slot 24, permanent magnetism Locating slot 24 can be inserted while being inserted into magnet slot 23 in body 25, and locating slot 24 can further limit the position of permanent magnet 25 It sets, so that 25 position of permanent magnet is fixed more accurate secured.

Further, as shown in Figure 3 and Figure 4, the straight line at both ends of each magnet slot 23 in the circumferential direction of rotor core 20 Distance is b, and the maximum radial distance of the peripheral surface of the centre distance rotor core 20 of rotor core 20 is R, and b and R meets b:R=0.95-1.0.

Work as b:When R ＜ 0.95, the length of permanent magnet 25 is too short in magnet slot 23, reduces the utilization rate of rotor core 20, from And reduce the efficiency of driving motor 100；Work as b:When R ＞ 1, the leakage field of rotor core 20 is will increase, can also reduce driving motor 100 efficiency.Therefore, in some embodiments of the utility model, b:When R=0.95-1.0, for example, in the utility model In some specific embodiments, b:R can be respectively 0.95,0.96,0.97,0.98,0.99 and 1.0 etc., and driving has been effectively ensured The efficiency of motor 100.

Some embodiments according to the present utility model, as shown in Figure 3 and Figure 4, the periphery of magnet slot 23 and rotor core 20 The minimum range in face is a1, and the minimum range of the peripheral surface of stator slot 24 and rotor core 20 is a2, permanent magnet 25 and rotor iron The minimum range of the peripheral surface of core 20 can be understood as one smaller value in a1 and a2, i.e. min (a1, a2).Min (a1, A2 when) too small, the mechanical strength of rotor core 20 can be made to reduce, to reduce the reliability of rotor core 20；And min (a1, A2 when) excessive, the leakage field of rotor core 20 can be increased, thereby reduce the efficiency of driving motor 100.

Therefore, in some embodiments of the utility model, min (a1, a2)=0.8mm-1.8mm, while ensure that and turn The mechanical strength and efficiency of sub- iron core 20.For example, in some specific embodiments of the utility model, min (a1, a2) can divide It Wei not 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm and 1.8mm etc..

In addition, the utility model the shape of magnet slot 23 is not done it is specifically limited, it is only necessary to meet the length of magnet slot 23 The bisector in direction makes the Distribution of Magnetic Field that permanent magnet 25 generates in magnet slot 23 by the requirement at the center of rotor core 20 More uniformly.For example, in example as shown in Figure 3, magnet slot 23 is the straight-line groove of strip, and straight-line groove is along rotor core 20 String direction extend, the distance b at the both ends of straight-line groove is the development length of straight-line groove.In example as shown in Figure 4, magnetic Body slot 23 is the arc groove of strip, and for arc groove along the circumferentially extending of rotor core 20, the distance b at the both ends of arc groove is arc The chord length of shape slot.

In some implementations of the utility model, as shown in Fig. 2, the outer profile of the radial section of stator yoke 11 can be big Body is circle, and 11 structure of stator yoke is more stablized, and being connected and fixed convenient for stator yoke 11 and stator teeth 12.

Some embodiments according to the present utility model, as shown in Fig. 2, each stator tooth socket 101 can respectively with stator hole 102 connections carry out coiling in order to the winding 14 of stator core 10 by the opening of stator tooth socket 101 being connected to stator hole 102, Coiling is convenient and efficient.

In some embodiments of the utility model, as shown in Figure 3 and Figure 4, the outer periphery of rotor core 20 can be formed Have multiple pole teeth 21, multiple pole teeth 21 along the circumferentially distributed of rotor core 20 and can outwardly protrude, two neighboring pole tooth 21 it Between be formed with tooth socket 22, also, in the embodiment with multiple magnet slots 23, magnet slot 23 can be corresponded with pole tooth 21 Setting.At this point, rotor core 20 is formed as salient-pole structure rotor, and compared with the rotor of wholecircle shape in the related technology, salient pole Construction rotor can prevent the leakage field and slot effect of rotor interpolar, to improve the efficiency of rotor core 20.

In addition, it is necessary to explanation, for the rotor core 20 with multiple pole teeth 21, the maximum outside diameter of rotor core 20 Size d refers to the connection line size of the tooth top for two pole teeth 21 that the line of tooth top crosses the axis of rotor core 20.

Further, with continued reference to shown in Fig. 3 and Fig. 4, the normal profile of pole tooth 21 can be formed as arc-shaped, rotor iron The outer periphery of the shaft section of core 20 can be formed by multiple arc-shaped are sequentially connected, and two neighboring arc-shaped junction is formed with Tooth socket 22.

In addition, as shown in Figure 3 and Figure 4, using the center of rotor core 20 circle tangent as the center of circle and with the tooth top of pole tooth 21 Radius be R (at this point, R=0.5d), it is tangent with the slot bottom of tooth socket 22 and using the center of rotor core 20 as the half of the circle in the center of circle Diameter is r.If r:R ＜ 0.96 can lead to the too short along the circumferential development length of rotor core 20 of pole tooth 21, reduce driving motor 100 performance；If r:R ＞ 0.98 can cause tooth socket 22 too small, when driving motor 100 is run, cannot effectively reduce tooth socket phase The noise jamming answered and generated.Therefore, in some embodiments of the utility model, r:R=0.96-0.98, for example, in this reality With in some novel specific embodiments, r:R can be respectively 0.96,0.97 and 0.98 etc., effectively reduce slot effect, together When ensure that the efficiency of driving motor 100.

Optionally, in the embodiments of the present invention, food cooking machine 200 can be wall-breaking machine, Normal juice machine, juice extractor Or soy bean milk making machine etc..Wall-breaking machine rotating speed is high, can be used for handling harder food, and can will be present in food pericarp, A large amount of plants element fully broken wall release at fruit stone and rhizome；Normal juice machine rotating speed is relatively low, is squeezed, less flexible is carried by push type The mode taken handles food；Juice extractor rotating speed is higher, and being pulverized and mixed for a greater variety of foods may be implemented；Soy bean milk making machine rotating speed compared with The functions such as preheating, mashing, mashing off and delay infusion process full-automation may be implemented in height.According to the utility model embodiment Driving motor 100 can be applied to a greater variety of food cooking machines 200, meet more use demands, and practicability is stronger.

It should be noted that above-described embodiment is only as a specific embodiment of the utility model.

Fig. 5 is the circuit diagram according to the power supply circuit of the food cooking machine of the utility model embodiment.As shown in figure 5, should The power supply circuit of food cooking machine may include：Rectifier bridge 1000, charging resistor 2000, controllable switch 3000, electrolytic capacitor 4000 With controller 5000.

Wherein, the input terminal of rectifier bridge 1000 is connected with AC power, and AC power is converted to direct current by rectifier bridge 1000 Power supply, to supply driving motor 100.One end of charging resistor 2000 is connected with the first output end of rectifier bridge 1000, charging electricity Output end DC-BUS of the other end of resistance 2000 as power supply circuit.Controllable switch 3000 is connected in parallel with charging resistor 2000. The positive terminal of electrolytic capacitor 4000 is connected with the other end of charging resistor 2000, the negative pole end and rectifier bridge of electrolytic capacitor 4000 1000 second output terminal is grounded GND after being connected, electrolytic capacitor 4000 carries out voltage stabilizing to DC power supply.Controller 5000 with it is controllable The control terminal of switch 3000 is connected, and controller 5000 controls the disconnection of controllable switch 3000 when food cooking machine 200 powers on, so that DC power supply is charged by charging resistor 2000 to electrolytic capacitor 4000, and is controlled after the rising of the voltage at 4000 both ends of electrolytic capacitor Controllable switch 3000 processed is closed.

Specifically, when user needs food cooking machine 200 to handle food, user is by food cooking machine 200 Plug is inserted on corresponding socket.When food cooking machine 200 powers on, AC power is exported to the input terminal of rectifier bridge 1000, AC power is converted into DC power supply by rectifier bridge 1000, controller 5000 sends out first control signal to controllably opening at this time The control terminal for closing 3000 makes DC power supply pass through 2000 (e.g., variable resistance of charging resistor to control the disconnection of controllable switch 3000 Device) it charges to electrolytic capacitor 4000, charging current is flowed through from charging resistor 2000 completely at this time, wherein due to electrolytic capacitor 4000 capacitance, which is hundreds of microfarads or more (e.g., 400uf-800uf), the voltage at 4000 both ends of electrolytic capacitor, to be mutated, institute To be equivalent to short circuit at the both ends of 200 powered on moment of food cooking machine, electrolytic capacitor 4000,4000 both ends of electrolytic capacitor at this time Voltage is 0V, the charging current flowed through from charging resistor 2000 be voltage value and the charging resistor 2000 of DC power supply resistance value it Between ratio.

Over time, the voltage at 4000 both ends of electrolytic capacitor is gradually increasing, for example, working as 4000 both ends of electrolytic capacitor Voltage rise to predeterminated voltage and (specifically can be demarcated according to actual conditions, for example, can be the voltage value of DC power supply 90%) when, controller 5000, which sends out second control signal, to be made straight to controllable switch 3000 with controlling the closure of controllable switch 3000 Galvanic electricity source is charged directly to electrolytic capacitor 4000, and charging current is flowed through from controllable switch 3000 completely at this time.

The power supply circuit of the food cooking machine of the utility model embodiment as a result, after AC power is by rectifier bridge, then leads to It crosses the network composed in parallel by charging resistor and controllable switch to charge to electrolytic capacitor so that high current is inserted food cooking machine Head just occurs after being completely attached to socket, can not only avoid forming electric arc when food cooking machine powers in this way, improves User security, while electric switch tripping is avoided, and also charging rate is fast.

Further, one embodiment according to the present utility model, as shown in fig. 6, the power supply of above-mentioned food cooking machine Circuit further includes voltage detecting circuit 6000, and voltage detecting circuit 6000 is connected with controller 5000, voltage detecting circuit 6000 To detect the voltage at 4000 both ends of electrolytic capacitor, wherein controller 5000 detects electrolysis electricity in voltage detecting circuit 6000 Hold control controllable switch 3000 when the voltage at 4000 both ends rises to predeterminated voltage to be closed.

One embodiment according to the present utility model, as shown in fig. 6, voltage detecting circuit 6000 may include first resistor R1 Be connected with the positive terminal of electrolytic capacitor 4000 with one end of second resistance R2, first resistor R1, the other end of first resistor R1 with One end of second resistance R2 is connected and has first node J1, the negative pole end of the other end and electrolytic capacitor 4000 of second resistance R2 It is connected, first node J1 is connected with controller 5000.

In the embodiments of the present invention, controllable switch 3000 can be relay.As shown in fig. 6, working as controllable switch 3000 when being relay, and controllable switch 3000 may include coil KM and switch K, and one end of coil KM and default power supply VCC are (e.g., 5V) it is connected, the other end of coil KM is connected with controller 5000, and one end of switch K is exported with the first of rectifier bridge 1000 respectively End is connected with one end of charging resistor 2000, and the other end of switch K is connected with the other end of charging resistor 2000.

Specifically, when food cooking machine 200 powers on, controller 5000 sends out first control signal to control in relay Coil KM obtain electric, switch K is disconnected, and so that DC power supply is passed through charging resistor 2000 and is given the charging of electrolytic capacitor 4000.In order to realize Charging process is accurately controlled, in the both ends shunt voltage detection circuit 6000 of electrolytic capacitor 4000, passes through voltage detecting electricity The voltage at 4000 both ends of electrolytic capacitor is detected on road 6000 in real time, if voltage detecting circuit 6000 detects 4000 liang of electrolytic capacitor The voltage at end rises to predeterminated voltage, and controller 5000 is then sent out second control signal and lost with the coil KM controlled in relay Electricity, switch K are closed, and DC power supply is made to charge directly to electrolytic capacitor 4000, to realize the essence to charging process Really control, and can avoid forming electric arc when food cooking machine 200 powers on, improve user security and electric switch is avoided to jump Lock, while can realize quick charge.

It should be noted that in above-described embodiment of the utility model, controllable switch 3000 only by taking relay as an example into Row explanation, certain controllable switch 3000 can be also other types of switch, and such as triode, tediously long to avoid, which is not described herein again.

In conclusion according to the utility model proposes food cooking machine power supply circuit, by the input terminal of rectifier bridge with AC power is connected, and one end of charging resistor is connected with the first output end of rectifier bridge, and the other end of charging resistor is as power supply The output end of circuit, controllable switch are connected in parallel with charging resistor, the positive terminal of electrolytic capacitor and the other end phase of charging resistor Even, the negative pole end of electrolytic capacitor is grounded after being connected with the second output terminal of rectifier bridge, the control terminal phase of controller and controllable switch Even, controller controls controllable switch disconnection when food cooking machine powers on, so that DC power supply gives electrolysis electricity by charging resistor Capacity charge, and control controllable switch is closed after the rising of the voltage at electrolytic capacitor both ends.The circuit can not only be avoided in food Electric arc is formed when cooking machine powers on, improve user security and electric switch is avoided to trip, and can realize quick charge.

To achieve the above object, on the other hand the utility model proposes a kind of food cooking machine comprising above-mentioned food The power supply circuit of object cooking machine.

The utility model proposes food cooking machine can not only be kept away by the power supply circuit of above-mentioned food cooking machine Exempt to form electric arc when food cooking machine powers on, improve user security and electric switch is avoided to trip, and can realize quickly Charging.

In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on ... shown in the drawings Or position relationship, be merely for convenience of describing the present invention and simplifying the description, do not indicate or imply the indicated device or Element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit to the utility model System.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention, It is a, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be Mechanical connection can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature and be directly above or diagonally above the second feature, or only Indicate that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.

In the description of this specification, reference term "one", "some", " example ", " specific example " or " some show The description of example " etc. means that this or example particular features, structures, materials, or characteristics described is combined to be contained in the utility model In at least one or example.In the present specification, schematic expression of the above terms are necessarily directed to identical or show Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more or example with suitable side Formula combines.In addition, without conflicting with each other, those skilled in the art can by described in this specification different or Example and difference or exemplary feature are combined.

Although the utility model has been shown and described above, it is to be understood that it is above-mentioned to be exemplary, it cannot Be construed as a limitation of the present invention, those skilled in the art in the scope of the utility model can to it is above-mentioned into Row change, modification, replacement and modification.

Claims (11)

1. a kind of power supply circuit of food cooking machine, which is characterized in that the food cooking machine includes driving motor, the power supply Circuit includes：

The input terminal of rectifier bridge, the rectifier bridge is connected with AC power, and the rectifier bridge is converted to the AC power directly Galvanic electricity source, to supply the driving motor；

Charging resistor, one end of the charging resistor are connected with the first output end of the rectifier bridge, the charging resistor it is another Output end of the one end as the power supply circuit；

Controllable switch, the controllable switch are connected in parallel with the charging resistor；

Electrolytic capacitor, the positive terminal of the electrolytic capacitor are connected with the other end of the charging resistor, and the electrolytic capacitor is born It is grounded after being extremely connected with the second output terminal of the rectifier bridge, the electrolytic capacitor carries out voltage stabilizing to the DC power supply；

Controller, the controller are connected with the control terminal of the controllable switch, and the controller is on the food cooking machine The controllable switch is controlled when electric to disconnect, so that the DC power supply is charged by the charging resistor to the electrolytic capacitor, And it controls the controllable switch after the rising of the voltage at the electrolytic capacitor both ends and is closed.

2. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the driving motor includes：

Stator core, the stator core include the stator yoke of annular and multiple stator teeths, the width of the stator yoke For W, multiple stator teeths are set to the inner peripheral surface of the stator yoke, and it is fixed to be formed between the two neighboring stator teeth Sub- tooth socket, multiple stator teeths limit the stator hole coaxial with the stator yoke, and each stator teeth includes The stator tooth boots of the stator teeth main body that is connected with the stator yoke and the inner end for being located at the stator teeth main body, Mei Gesuo The width for stating stator teeth main body is V, wherein W：V=0.6-0.7；

Rotor core, the rotor core are rotatably arranged in the stator hole and coaxial with the stator hole.

3. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the driving motor includes：

Stator core, the stator core include annular stator yoke and set on the stator yoke inner peripheral surface it is multiple fixed Sub- teeth portion, is formed with stator tooth socket between the two neighboring stator teeth, multiple stator teeths limit with it is described fixed The maximum radial dimension of the coaxial stator hole in sub- yoke portion, the stator yoke is D；

Rotor core, the rotor core is rotatably arranged in the stator hole and, the rotor coaxial with the stator hole The maximum radial dimension of iron core is d, wherein D and d meets：0.4≤d/D≤0.55.

4. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the controllable switch is relay.

5. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the charging resistor is variable resistance Device.

6. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the driving motor is brush DC Motor.

7. the power supply circuit of the food cooking machine as described in any one of claim 1-6, which is characterized in that further include voltage inspection Slowdown monitoring circuit, the voltage detecting circuit are connected with the controller, and the voltage detecting circuit is detecting the electrolytic capacitor The voltage at both ends, wherein the controller detects that the voltage at the electrolytic capacitor both ends rises in the voltage detecting circuit The controllable switch is controlled when to predeterminated voltage to be closed.

8. the power supply circuit of food cooking machine as claimed in claim 7, which is characterized in that the voltage detecting circuit includes the One resistance and second resistance, one end of the first resistor are connected with the positive terminal of the electrolytic capacitor, the first resistor The other end is connected with one end of the second resistance and has first node, the other end of the second resistance and electrolysis electricity The negative pole end of appearance is connected, and the first node is connected with the controller.

9. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the capacitance of the electrolytic capacitor is 400uf-800uf。

10. the power supply circuit of food cooking machine as described in claim 1, which is characterized in that the food cooking machine is broken wall Machine.

11. a kind of food cooking machine, which is characterized in that including the food cooking machine as described in any one of claim 1-10 Power supply circuit.