CN204349809U - Radar non-contact power supply - Google Patents

Abstract

The utility model discloses a radar non-contact power supply, which comprises a rotatable antenna seat and a fixed seat, the fixed seat is provided with a primary magnetic core, and the antenna seat is provided with a secondary magnetic core coupled with the primary magnetic core. The magnetic core, the primary magnetic core and the secondary magnetic core both include a magnetic core and a coil located in the magnetic core, and the coil of the primary magnetic core has a power supply electrode drawn from the fixed seat, and the primary magnetic core The coil of the magnetic core leads to an output electrode on the antenna base, and its power supply end and the antenna base transmit electric energy without contacting with a brush, which is not easy to wear and is not affected by dust.

Description

Radar contactless power supply

technical field

The utility model relates to the field of radar, in particular to a radar non-contact power supply.

Background technique

 The power supply is the key to ensure the safe operation of the radar, and the power supply is needed on the rotating radar. The existing radar power supply is shown in Figure 1, which adopts a slip ring coupling power supply, including a rotatable antenna seat, a fixed seat, a bottom power supply electrode, an output electrode at the antenna end, a brush and a rotating slip ring. Ring contact feed. There are many problems in practical application. First, the slip ring will generate friction with the brush when it rotates, and the contact points are susceptible to wear during the continuous friction; second, it is also easily affected by dust.

Utility model content

The technical problem to be solved by the utility model is to provide a radar non-contact power supply, the power supply terminal and the antenna seat do not need to be in contact with a brush to transmit electric energy, and are not easy to wear and are not affected by dust.

The technical solution adopted by the utility model to solve the above problems is:

The radar non-contact power supply includes a rotatable antenna base and a fixed base, the fixed base is provided with a primary magnetic core, the antenna base is provided with a secondary magnetic core coupled with the primary magnetic core, and the primary Both the magnetic core and the secondary magnetic core include a magnetic core and a coil located in the magnetic core, the coil of the primary magnetic core is drawn with a power supply electrode on the fixed seat, and the coil of the primary magnetic core is placed on the antenna seat An output electrode is drawn from the top.

The utility model is improved on the basis of the prior art, and the coupling mode of the existing power supply is improved from a collector ring coupling mode to a magnetic coupling mode. The primary magnetic core and the secondary magnetic core are coupled to realize the conversion and transmission of electric energy. When the antenna base drives the secondary magnetic core to rotate, the primary magnetic core and the secondary magnetic core do not touch, that is, there will be no friction between the slip ring and the brush. problems, less prone to wear and unaffected by dust.

Preferably, the magnetic core is a pot-shaped magnetic core. The bobbin and winding of the pot-shaped magnetic core are almost completely wrapped by the magnetic core, and the magnetic flux leakage is the least, so that it has a very good shielding effect on electromagnetic interference, and the primary magnetic core and the secondary magnetic core are not in contact, that is, it is a non-contact transformer. Therefore, it is most suitable to use a pot-shaped magnetic core.

Preferably, in order to ensure the stable power supply of the radar power supply, the power supply electrode is sequentially connected with a switch tube and a power control chip for controlling the switching of the switch tube, and the output electrode is sequentially connected with a rectifier circuit and a DC/DC conversion circuit.

The input power is controlled by the power control chip to drive the switching tube to provide energy to the transformer, and the transformer performs magnetoelectric conversion, and the primary magnetic core transmits the primary electric energy to the secondary magnetic core, which is converted into stable electric energy after the rectification circuit and DC/DC conversion circuit. output.

Further, a ringing suppression circuit is connected to the power supply electrode. The utility model adopts a switching power supply to save energy and improve work efficiency. Due to the leakage inductance of the primary of the transformer, when the switch tube is turned on from saturation to cut off, a counter potential will be generated, and the counter potential will charge and discharge the distributed capacitance of the primary coil of the transformer, resulting in ringing. The voltage amplitude of its back EMF is generally very high, and the energy is also very large, which will break down the switch tube and cause interference to the transformer itself, so the ringing suppression circuit is used to absorb its energy and reduce the amplitude of the ringing voltage .

Further, in order to ensure the stable output of the power supply, an overvoltage protection circuit is also connected to the output electrodes.

Further, in order to protect subsequent circuits, a voltage stabilization detection circuit is also connected between the power supply control chip and the power supply electrodes.

In summary, the beneficial effects of the utility model are:

1. The transformer of this utility model adopts a magnetic coupling method, and the primary magnetic core and the secondary magnetic core are coupled to realize the conversion and transmission of electric energy. When the antenna base drives the secondary magnetic core to rotate, the primary magnetic core and the secondary magnetic core do not touch , that is, there will be no friction between the slip ring and the brush, and it is not easy to wear and is not affected by dust.

2. The utility model utilizes the power supply control chip to control the switching off of the switch tube, and after the transformer transforms the voltage, it rectifies and stabilizes the output, which can ensure the stable output of the power supply.

Description of drawings

Fig. 1 is a schematic structural diagram of an existing power supply.

Fig. 2 is a schematic structural view of the utility model.

Fig. 3 is a schematic structural view of the magnetic core of the present invention.

Fig. 4 is a schematic diagram of the power supply circuit of the present invention.

The marks in the drawings and the names of corresponding parts: 1. Antenna base; 2. Fixing seat; 3. Primary core; 4. Secondary core; 5. Core; 6. Coil; 7. Power supply electrode; output electrode.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1:

A radar non-contact power supply as shown in Figure 2 and Figure 3, includes a rotatable antenna base 1 and a fixed base 2, the fixed base 2 is provided with a primary magnetic core 3, and the antenna base 1 is provided with There is a secondary magnetic core 4 coupled with the primary magnetic core 3, the primary magnetic core 3 and the secondary magnetic core 4 both include a magnetic core 5 and a coil 6 located in the magnetic core 5, the primary magnetic core The coil 6 of the core 3 leads to a power supply electrode 7 on the fixed seat 2 , and the coil 6 of the primary magnetic core 3 leads to an output electrode 8 on the antenna seat 1 .

In this embodiment, an improvement is made on the basis of the prior art, and the coupling mode of the existing power supply is improved from the slip ring coupling mode to the magnetic coupling mode. When in use, the fixing base 2 is fixed on the base of the radar, the antenna base 1 is fixed on the turntable of the radar, and the secondary magnetic core 4 of the transformer rotates with the turntable. The primary magnetic core and the secondary magnetic core are coupled to realize the conversion and transmission of electric energy. When the antenna base drives the secondary magnetic core to rotate, the primary magnetic core and the secondary magnetic core do not touch, that is, there will be no friction between the slip ring and the brush. problems, less prone to wear and unaffected by dust.

The magnetic core in this embodiment can adopt various structures. In order to improve the shielding effect on electromagnetic interference, the magnetic core 5 is preferably a pot-shaped magnetic core.

Example 2:

A radar non-contact power supply as shown in Figures 2 to 4, in order to achieve a stable output of the power supply, this embodiment refines the power supply on the basis of Embodiment 1, that is, the power supply electrodes 7 are sequentially connected There is a switching tube and a power control chip for controlling the switching of the switching tube, and the output electrode 8 is sequentially connected with a rectification circuit and a DC/DC conversion circuit. The principle of this power supply circuit is: the input power is controlled by the power control chip to drive the switch tube to provide energy to the transformer, and the transformer performs magnetoelectric conversion, and the primary magnetic core transmits the primary electric energy to the secondary magnetic core, through the rectifier circuit and DC/DC After the conversion circuit, it becomes stable electric energy for output.

In order to protect the switching tube and the transformer, a ringing suppression circuit is connected to the power supply electrode 7 .

The output electrode 8 is also connected with an overvoltage protection circuit.

A voltage stabilization detection circuit is also connected between the power control chip and the power supply electrode 7 .

Example 3:

As shown in Figure 4, a detailed implementation of a group of radar power supplies is now disclosed:

The input power supply Vin is controlled by the power control chip to drive the switch tube QA1 to provide energy to the transformer, and the transformer performs magnetoelectric conversion, and the primary magnetic core transmits the primary electric energy to the secondary magnetic core, and becomes stable after the rectification circuit and the DC/DC conversion circuit. Power supply for output. Among them, CA1 and CA2 are input filter circuits; RA1 and EN terminals realize enable control; RA2, CA3 and DA1 form a ringing suppression circuit to reduce the amplitude of ringing voltage and protect the switch tube and transformer; QA1 is the power supply The switching tube is driven and controlled by the power control chip; RA6, RA5, and CA4 form an overcurrent protection detection circuit, and RA3 realizes the pre-stage voltage stabilization detection, which constitutes a voltage stabilization detection circuit; DB1, CB1, RB1, CB2, and CB3 form an output rectifier , filter circuit; ZDB1 stabilizes the output voltage, that is, the overvoltage protection circuit; the DC/DC conversion circuit adjusts the precise voltage for the output, and realizes the stable output of the voltage. Among them, the DC/DC conversion circuit is a common voltage in the prior art, and there are many ways to realize it; the power control chip can use the chip LT3748.

As mentioned above, the utility model can be better realized.

Claims (6)

1. Radar non-contact power supply, including a rotatable antenna base (1) and a fixed base (2), characterized in that: the fixed base (2) is provided with a primary magnetic core (3), and the antenna base (1) is provided with a secondary magnetic core (4) coupled with the primary magnetic core (3), and the primary magnetic core (3) and the secondary magnetic core (4) both include a magnetic core (5) and the coil (6) located in the magnetic core (5), the coil (6) of the primary magnetic core (3) leads to a power supply electrode (7) on the fixed seat (2), and the primary magnetic core ( 3) The coil (6) leads out to an output electrode (8) on the antenna base (1). 2. The radar non-contact power supply according to claim 1, characterized in that: the magnetic core (5) is a pot-shaped magnetic core. 3. The radar non-contact power supply according to claim 1, characterized in that: the power supply electrode (7) is sequentially connected with a switch tube and a power control chip that controls the switch tube switch, and the output electrode (8) A rectifier circuit and a DC/DC conversion circuit are sequentially connected to the top. 4. The radar non-contact power supply according to any one of claims 1 to 3, characterized in that a ringing suppression circuit is connected to the power supply electrode (7). 5. The radar non-contact power supply according to claim 3, characterized in that an overvoltage protection circuit is also connected to the output electrode (8). 6. The radar non-contact power supply according to claim 3, characterized in that a voltage stabilization detection circuit is also connected between the power supply control chip and the power supply electrode (7).